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American Renal Associates Holdings, Inc. – ‘10-K’ for 12/31/18 – ‘EX-101.LAB’

On:  Wednesday, 9/4/19, at 6:51pm ET   ·   As of:  9/5/19   ·   For:  12/31/18   ·   Accession #:  1498068-19-60   ·   File #:  1-37751

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  As Of               Filer                 Filing    For·On·As Docs:Size

 9/05/19  American Renal Assocs Holdin… Inc 10-K       12/31/18  129:43M

Annual Report   —   Form 10-K   —   Sect. 13 / 15(d) – SEA’34
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   3.58M 
 2: EX-4.1      Instrument Defining the Rights of Security Holders  HTML     80K 
 5: EX-10.11    Material Contract                                   HTML     46K 
 6: EX-10.12    Material Contract                                   HTML     55K 
 3: EX-10.6     Material Contract                                   HTML     46K 
 4: EX-10.7     Material Contract                                   HTML     55K 
 7: EX-21.1     Subsidiaries List                                   HTML    100K 
 8: EX-23.1     Consent of Experts or Counsel                       HTML     34K 
 9: EX-31.1     Certification -- §302 - SOA'02                      HTML     41K 
10: EX-31.2     Certification -- §302 - SOA'02                      HTML     41K 
11: EX-32.1     Certification -- §906 - SOA'02                      HTML     36K 
12: EX-32.2     Certification -- §906 - SOA'02                      HTML     36K 
98: R1          Document and Entity Information                     HTML     69K 
23: R2          Consolidated Balance Sheets                         HTML    156K 
65: R3          Consolidated Balance Sheets (Parenthetical)         HTML     55K 
110: R4          Consolidated Statements of Operations               HTML    117K  
100: R5          Consolidated Statements of Comprehensive (Loss)     HTML     60K  
                Income                                                           
25: R6          Consolidated Statements of Changes in Equity        HTML    194K 
67: R7          Consolidated Statements of Changes in Equity        HTML     38K 
                (Parenthetical)                                                  
112: R8          Consolidated Statements of Cash Flows               HTML    165K  
96: R9          Basis of Presentation and Organization              HTML     41K 
84: R10         Summary of Significant Accounting Policies          HTML    131K 
128: R11         Restatement of Consolidated Financial Statements    HTML    626K  
55: R12         Initial Public Offering                             HTML     62K 
41: R13         Cash                                                HTML     49K 
85: R14         Prepaid Expenses and Other Current Assets           HTML     45K 
129: R15         Acquisitions and Divestitures                       HTML     64K  
56: R16         Fair Value Measurements                             HTML    147K 
42: R17         Property and Equipment                              HTML     60K 
86: R18         Intangible Assets and Goodwill                      HTML     69K 
127: R19         Accrued Expenses and Other Current Liabilities      HTML     61K  
61: R20         Variable Interest Entities                          HTML     42K 
20: R21         Noncontrolling Interests Subject to Put Provisions  HTML     79K 
87: R22         Changes in Ownership Interest in Consolidated       HTML     53K 
                Subsidiaries                                                     
101: R23         Debt                                                HTML    114K  
62: R24         Leases                                              HTML     74K 
21: R25         Income Taxes                                        HTML    138K 
88: R26         Loss Per Share                                      HTML     59K 
102: R27         Stock-Based Compensation                            HTML    119K  
60: R28         Related Party Transactions                          HTML     46K 
22: R29         Commitments and Contingencies                       HTML     42K 
45: R30         Certain Legal Matters and Other Matters             HTML     63K 
58: R31         Employee Benefit Plan                               HTML     37K 
126: R32         Concentrations                                      HTML     38K  
83: R33         Subsequent Events                                   HTML     56K 
44: R34         Selected Quarterly Financial Data (Unaudited)       HTML   3.06M 
57: R35         Schedule Ii - Valuation and Qualifying Accounts     HTML     52K 
125: R36         Summary of Significant Accounting Policies          HTML    152K  
                (Policies)                                                       
82: R37         Summary of Significant Accounting Policies          HTML     53K 
                (Tables)                                                         
43: R38         Restatement of Consolidated Financial Statements    HTML   3.58M 
                (Tables)                                                         
59: R39         Cash (Tables)                                       HTML     47K 
27: R40         Prepaid Expenses and Other Current Assets (Tables)  HTML     46K 
64: R41         Acquisitions and Divestitures (Tables)              HTML     47K 
113: R42         Fair Value Measurements (Tables)                    HTML    119K  
97: R43         Property and Equipment (Tables)                     HTML     56K 
26: R44         Intangible Assets and Goodwill (Tables)             HTML     73K 
63: R45         Accrued Expenses and Other Current Liabilities      HTML     62K 
                (Tables)                                                         
111: R46         Noncontrolling Interests Subject to Put Provisions  HTML     73K  
                (Tables)                                                         
95: R47         Changes in Ownership Interest in Consolidated       HTML     54K 
                Subsidiaries (Tables)                                            
24: R48         Debt (Tables)                                       HTML     78K 
66: R49         Leases (Tables)                                     HTML     68K 
49: R50         Income Taxes (Tables)                               HTML    139K 
32: R51         Loss Per Share (Tables)                             HTML     58K 
80: R52         Stock-Based Compensation (Tables)                   HTML    105K 
120: R53         Subsequent Events (Tables)                          HTML     45K  
50: R54         Selected Quarterly Financial Data (Unaudited)       HTML   3.64M 
                (Tables)                                                         
33: R55         Basis of Presentation and Organization (Details)    HTML     56K 
81: R56         Summary of Significant Accounting Policies          HTML    168K 
                (Details)                                                        
122: R57         Summary of Significant Accounting Policies          HTML     48K  
                Schedule of Revenue (Details)                                    
47: R58         Restatement of Consolidated Financial Statements -  HTML    216K 
                Restated Consolidated Balance Sheets (Details)                   
36: R59         Restatement of Consolidated Financial Statements -  HTML     57K 
                Restated Consolidated Balance Sheet                              
                (Parenthetical) (Details)                                        
89: R60         Restatement of Consolidated Financial Statements -  HTML    192K 
                Restated Consolidated Statements of Operations                   
                (Details)                                                        
106: R61         Restatement of Consolidated Financial Statements -  HTML     77K  
                Restated Consolidated Statements of Comprehensive                
                Income (Details)                                                 
68: R62         Restatement of Consolidated Financial Statements -  HTML    264K 
                Restated Consolidated Statements of Cash Flows                   
                (Details)                                                        
28: R63         Initial Public Offering (Details)                   HTML    172K 
92: R64         Cash (Details)                                      HTML     48K 
109: R65         Prepaid Expenses and Other Current Assets           HTML     46K  
                (Details)                                                        
71: R66         Acquisitions and Divestitures - Acquisitions        HTML     80K 
                (Details)                                                        
31: R67         Acquisitions and Divestitures - Divestitures        HTML     63K 
                (Details)                                                        
93: R68         Fair Value Measurements - Narrative (Details)       HTML     44K 
104: R69         Fair Value Measurements - Schedule of fair value    HTML     94K  
                (Details)                                                        
117: R70         Fair Value Measurements - Fair value rollforward    HTML     44K  
                of tax receivable agreement liability (Details)                  
77: R71         Property and Equipment (Details)                    HTML     82K 
40: R72         Intangible Assets and Goodwill - Schedule of        HTML     60K 
                intangible assets (Details)                                      
54: R73         Intangible Assets and Goodwill - Estimated annual   HTML     52K 
                amortization expense (Details)                                   
114: R74         Intangible Assets and Goodwill - Changes in the     HTML     45K  
                value of goodwill (Details)                                      
74: R75         Accrued Expenses and Other Current Liabilities      HTML     64K 
                (Details)                                                        
37: R76         Variable Interest Entities (Details)                HTML     38K 
51: R77         Noncontrolling Interests Subject to Put Provisions  HTML     69K 
                (Details)                                                        
119: R78         Changes in Ownership Interest in Consolidated       HTML     56K  
                Subsidiaries (Details)                                           
73: R79         Debt - Schedule of long term-term debt (Details)    HTML     94K 
116: R80         Debt Debt - Scheduled maturities of long-term debt  HTML     55K  
                (Details)                                                        
76: R81         Debt - Narrative (Details)                          HTML    226K 
39: R82         Leases - Narrative (Details)                        HTML     57K 
53: R83         Leases - Schedule of Future Minimum Lease Payments  HTML    121K 
                (Details)                                                        
115: R84         Income Taxes - Provision (Benefit) for Income       HTML     64K  
                Taxes (Details)                                                  
75: R85         Income Taxes - Significant components of deferred   HTML     84K 
                tax assets and liabilities (Details)                             
38: R86         Income Taxes Income Taxes - Narrative (Details)     HTML     59K 
52: R87         Income Taxes - Reconciliation of the federal        HTML     56K 
                statutory rate (Details)                                         
118: R88         Income Taxes - Gross amounts of unrecognized tax    HTML     43K  
                benefits (Details)                                               
72: R89         Loss Per Share (Details)                            HTML     64K 
90: R90         Stock-Based Compensation - Narrative (Details)      HTML    100K 
107: R91         Stock-Based Compensation - Equity Grants,           HTML     42K  
                Assumptions and Activity (Details)                               
69: R92         Stock-Based Compensation - Assumptions used for     HTML     55K 
                options granted (Details)                                        
29: R93         Stock-Based Compensation - Stock option activity    HTML    103K 
                (Details)                                                        
91: R94         Stock-Based Compensation - Restricted stock         HTML     60K 
                activity (Details)                                               
108: R95         Related Party Transactions (Details)                HTML     75K  
70: R96         Commitments and Contingencies (Details)             HTML     46K 
30: R97         Certain Legal Matters and Other Matters (Details)   HTML     79K 
94: R98         Employee Benefit Plan (Details)                     HTML     36K 
105: R99         Concentrations (Details)                            HTML     35K  
123: R100        Subsequent Events - Acquisitions (Details)          HTML     77K  
78: R101        Subsequent Events - Narrative (Details)             HTML     95K 
34: R102        Selected Quarterly Financial Data (Unaudited)       HTML     73K 
                (Details)                                                        
46: R103        Selected Quarterly Financial Data (Unaudited) -     HTML    216K 
                Condensed Consolidated Balance Sheets (Details)                  
124: R104        Selected Quarterly Financial Data (Unaudited) -     HTML     57K  
                Condensed Consolidated Balance Sheets                            
                (Parenthetical) (Details)                                        
79: R105        Selected Quarterly Financial Data (Unaudited) -     HTML    198K 
                Condensed Consolidated Statements of Operations                  
                (Details)                                                        
35: R106        Selected Quarterly Financial Data (Unaudited) -     HTML     77K 
                Consolidated Statements of Comprehensive Income                  
                (Loss) (Details)                                                 
48: R107        Selected Quarterly Financial Data (Unaudited) -     HTML    264K 
                Condensed Consolidated Statements of Cash Flows                  
                (Details)                                                        
121: R108        Schedule Ii - Valuation and Qualifying Accounts     HTML     43K  
                (Details)                                                        
99: XML         IDEA XML File -- Filing Summary                      XML    226K 
19: EXCEL       IDEA Workbook of Financial Reports                  XLSX    222K 
13: EX-101.INS  XBRL Instance -- ara-20181231                        XML  14.05M 
15: EX-101.CAL  XBRL Calculations -- ara-20181231_cal                XML    394K 
16: EX-101.DEF  XBRL Definitions -- ara-20181231_def                 XML   1.30M 
17: EX-101.LAB  XBRL Labels -- ara-20181231_lab                      XML   2.61M 
18: EX-101.PRE  XBRL Presentations -- ara-20181231_pre               XML   1.92M 
14: EX-101.SCH  XBRL Schema -- ara-20181231                          XSD    266K 
103: ZIP         XBRL Zipped Folder -- 0001498068-19-000060-xbrl      Zip    711K

‘EX-101.LAB’   —   XBRL Labels — ara-20181231_lab

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<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_9090C94383E103183D04958D83F62D53_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_9090C94383E103183D04958D83F62D53" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average expected term in years </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_C40F6478AD1D3208ED94958D83F68F6C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_0266DEBA1778519EBFF5958D83F6B954_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_0266DEBA1778519EBFF5958D83F6B954" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted-average grant-date fair value (in USD per share) </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_0266DEBA1778519EBFF5958D83F6B954" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_A6BDBD6C18103094D686958D84D61CC3_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_A6BDBD6C18103094D686958D84D61CC3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill and Intangible Assets Disclosure [Abstract] </link:label>
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<link:label id="lab_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_399B5F0992923F29F457958D84D64CDF_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_399B5F0992923F29F457958D84D64CDF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of intangible assets </link:label>
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<link:label id="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_57659F9AF51E8E81BF5E958D84D6DCC8_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_57659F9AF51E8E81BF5E958D84D6DCC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of estimated annual amortization expense </link:label>
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<link:label id="lab_dei_EntityFilerCategory_F2CFA4EE8F2A6FDBD72F958D86C96F01_label_en-US" xlink:label="lab_dei_EntityFilerCategory_F2CFA4EE8F2A6FDBD72F958D86C96F01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Entity Filer Category </link:label>
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<link:label id="lab_dei_EntityPublicFloat_EF48B0845F8CD9F2303F958D86C94E47_terseLabel_en-US" xlink:label="lab_dei_EntityPublicFloat_EF48B0845F8CD9F2303F958D86C94E47" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Entity Public Float </link:label>
<link:label id="lab_dei_EntityPublicFloat_EF48B0845F8CD9F2303F958D86C94E47_label_en-US" xlink:label="lab_dei_EntityPublicFloat_EF48B0845F8CD9F2303F958D86C94E47" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Entity Public Float </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityPublicFloat" xlink:label="loc_dei_EntityPublicFloat_EF48B0845F8CD9F2303F958D86C94E47" xlink:type="locator"/>
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<link:label id="lab_dei_EntityCommonStockSharesOutstanding_3E7BE9CC2AE36BA3B197958D86C9429E_terseLabel_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_3E7BE9CC2AE36BA3B197958D86C9429E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Entity Common Stock, Shares Outstanding </link:label>
<link:label id="lab_dei_EntityCommonStockSharesOutstanding_3E7BE9CC2AE36BA3B197958D86C9429E_label_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_3E7BE9CC2AE36BA3B197958D86C9429E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Entity Common Stock, Shares Outstanding </link:label>
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<link:label id="lab_dei_DocumentFiscalYearFocus_7EC0E9A02E9D9A49F833958D86C94046_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_7EC0E9A02E9D9A49F833958D86C94046" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Document Fiscal Year Focus </link:label>
<link:label id="lab_dei_DocumentFiscalYearFocus_7EC0E9A02E9D9A49F833958D86C94046_label_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_7EC0E9A02E9D9A49F833958D86C94046" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Document Fiscal Year Focus </link:label>
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<link:label id="lab_dei_DocumentFiscalPeriodFocus_C243781A08D93EB5983E958D86C9B757_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_C243781A08D93EB5983E958D86C9B757" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Document Fiscal Period Focus </link:label>
<link:label id="lab_dei_DocumentFiscalPeriodFocus_C243781A08D93EB5983E958D86C9B757_label_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_C243781A08D93EB5983E958D86C9B757" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Document Fiscal Period Focus </link:label>
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<link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_1BCA67D9449E21CBB88EB7083CEA3466_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract_1BCA67D9449E21CBB88EB7083CEA3466" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement of Financial Position [Abstract] </link:label>
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<link:label id="lab_us-gaap_AssetsAbstract_03C41506D0CD590AD0F3B7083CEAA013_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_03C41506D0CD590AD0F3B7083CEAA013" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Assets </link:label>
<link:label id="lab_us-gaap_AssetsAbstract_03C41506D0CD590AD0F3B7083CEAA013_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_03C41506D0CD590AD0F3B7083CEAA013" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets [Abstract] </link:label>
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<link:label id="lab_us-gaap_Cash_9B7FAC1A5927B033C7AAB7083CEBBB96_terseLabel_en-US" xlink:label="lab_us-gaap_Cash_9B7FAC1A5927B033C7AAB7083CEBBB96" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash </link:label>
<link:label id="lab_us-gaap_Cash_9B7FAC1A5927B033C7AAB7083CEBBB96_label_en-US" xlink:label="lab_us-gaap_Cash_9B7FAC1A5927B033C7AAB7083CEBBB96" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash_9B7FAC1A5927B033C7AAB7083CEBBB96" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccountsReceivableNetCurrent_B37F4FCA31E777F97FF6B7083CEB0477_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_B37F4FCA31E777F97FF6B7083CEB0477" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accounts receivable, less allowance for doubtful accounts of $3,270, $8,676, and $9,733 at December 31, 2018, 2017, and 2016, respectively </link:label>
<link:label id="lab_us-gaap_AccountsReceivableNetCurrent_B37F4FCA31E777F97FF6B7083CEB0477_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_B37F4FCA31E777F97FF6B7083CEB0477" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Receivable, after Allowance for Credit Loss, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_B37F4FCA31E777F97FF6B7083CEB0477" xlink:type="locator"/>
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<link:label id="lab_us-gaap_InventoryNet_CAC5F09D55F2D8288669B7083CEBE12B_terseLabel_en-US" xlink:label="lab_us-gaap_InventoryNet_CAC5F09D55F2D8288669B7083CEBE12B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Inventories </link:label>
<link:label id="lab_us-gaap_InventoryNet_CAC5F09D55F2D8288669B7083CEBE12B_label_en-US" xlink:label="lab_us-gaap_InventoryNet_CAC5F09D55F2D8288669B7083CEBE12B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Inventory, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_CAC5F09D55F2D8288669B7083CEBE12B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_2FD0AC126CE219BAA9B0B7083CEBA697_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_2FD0AC126CE219BAA9B0B7083CEBA697" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Prepaid expenses and other current assets </link:label>
<link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_2FD0AC126CE219BAA9B0B7083CEBA697_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_2FD0AC126CE219BAA9B0B7083CEBA697" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Prepaid Expense and Other Assets, Current </link:label>
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<link:label id="lab_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_015B6EDC99367CA12DCAB727033F2876_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_015B6EDC99367CA12DCAB727033F2876" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Current assets held for sale </link:label>
<link:label id="lab_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_015B6EDC99367CA12DCAB727033F2876_label_en-US" xlink:label="lab_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_015B6EDC99367CA12DCAB727033F2876" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets Held-for-sale, Not Part of Disposal Group, Current </link:label>
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<link:label id="lab_us-gaap_AssetsCurrent_A993130535931DB44D71B7083CEC2BC0_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrent_A993130535931DB44D71B7083CEC2BC0" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total current assets </link:label>
<link:label id="lab_us-gaap_AssetsCurrent_A993130535931DB44D71B7083CEC2BC0_label_en-US" xlink:label="lab_us-gaap_AssetsCurrent_A993130535931DB44D71B7083CEC2BC0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets, Current </link:label>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_0526DF9064CF6A49B554B7083CEC00DA_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_0526DF9064CF6A49B554B7083CEC00DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, net of accumulated depreciation </link:label>
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<link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_F67EDBDBB014803E702FB7083CEB7DF8_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_F67EDBDBB014803E702FB7083CEB7DF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Deferred tax assets </link:label>
<link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_F67EDBDBB014803E702FB7083CEB7DF8_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_F67EDBDBB014803E702FB7083CEB7DF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Income Tax Assets, Net </link:label>
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<link:label id="lab_us-gaap_OtherAssetsNoncurrent_054E22957748DF1855DDB7083CECCF60_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_054E22957748DF1855DDB7083CECCF60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other long-term assets </link:label>
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<link:label id="lab_us-gaap_Goodwill_17CFCB40E3DC9DE89F22B7083CED37AD_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_17CFCB40E3DC9DE89F22B7083CED37AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Goodwill </link:label>
<link:label id="lab_us-gaap_Goodwill_17CFCB40E3DC9DE89F22B7083CED37AD_label_en-US" xlink:label="lab_us-gaap_Goodwill_17CFCB40E3DC9DE89F22B7083CED37AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill </link:label>
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<link:label id="lab_us-gaap_Assets_3BBD3791A7A369A25EB8B7083CEDD21F_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_3BBD3791A7A369A25EB8B7083CEDD21F" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total assets </link:label>
<link:label id="lab_us-gaap_Assets_3BBD3791A7A369A25EB8B7083CEDD21F_label_en-US" xlink:label="lab_us-gaap_Assets_3BBD3791A7A369A25EB8B7083CEDD21F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets </link:label>
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<link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_463D4A58D14438E19307B7083CED03D2_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_463D4A58D14438E19307B7083CED03D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Liabilities and Equity </link:label>
<link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_463D4A58D14438E19307B7083CED03D2_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_463D4A58D14438E19307B7083CED03D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities and Equity [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_463D4A58D14438E19307B7083CED03D2" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccountsPayableCurrent_F7478E8C20B263AD8155B7083CED4E1F_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent_F7478E8C20B263AD8155B7083CED4E1F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accounts payable </link:label>
<link:label id="lab_us-gaap_AccountsPayableCurrent_F7478E8C20B263AD8155B7083CED4E1F_label_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent_F7478E8C20B263AD8155B7083CED4E1F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Payable, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_F7478E8C20B263AD8155B7083CED4E1F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_07CABA532CD9B00B0804B7083CEDC1FA_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_07CABA532CD9B00B0804B7083CEDC1FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued compensation and benefits </link:label>
<link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_07CABA532CD9B00B0804B7083CEDC1FA_label_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_07CABA532CD9B00B0804B7083CEDC1FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Employee-related Liabilities, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_07CABA532CD9B00B0804B7083CEDC1FA" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccruedLiabilitiesCurrent_5CFB690599536CCECB09B7083CEE9884_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_5CFB690599536CCECB09B7083CEE9884" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued expenses and other current liabilities </link:label>
<link:label id="lab_us-gaap_AccruedLiabilitiesCurrent_5CFB690599536CCECB09B7083CEE9884_label_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_5CFB690599536CCECB09B7083CEE9884" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accrued Liabilities, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_5CFB690599536CCECB09B7083CEE9884" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LongTermDebtCurrent_8F694DA75BF883734CE2B7083CEE74E6_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent_8F694DA75BF883734CE2B7083CEE74E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Current portion of long-term debt </link:label>
<link:label id="lab_us-gaap_LongTermDebtCurrent_8F694DA75BF883734CE2B7083CEE74E6_label_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent_8F694DA75BF883734CE2B7083CEE74E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Current Maturities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_8F694DA75BF883734CE2B7083CEE74E6" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LiabilitiesCurrent_61C276851294A135A14FB7083CEE4EE9_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_61C276851294A135A14FB7083CEE4EE9" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total current liabilities </link:label>
<link:label id="lab_us-gaap_LiabilitiesCurrent_61C276851294A135A14FB7083CEE4EE9_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_61C276851294A135A14FB7083CEE4EE9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_61C276851294A135A14FB7083CEE4EE9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrent_61C276851294A135A14FB7083CEE4EE9" xlink:to="lab_us-gaap_LiabilitiesCurrent_61C276851294A135A14FB7083CEE4EE9" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebtNoncurrent_B94397E876F539963620B7083CEEFCAF_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent_B94397E876F539963620B7083CEEFCAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term debt, less current portion </link:label>
<link:label id="lab_us-gaap_LongTermDebtNoncurrent_B94397E876F539963620B7083CEEFCAF_label_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent_B94397E876F539963620B7083CEEFCAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Excluding Current Maturities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_B94397E876F539963620B7083CEEFCAF" xlink:type="locator"/>
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<link:label id="lab_ara_IncomeTaxReceivableAgreementPayable_757BBAE2FC55545A609EB7083CEEDB27_terseLabel_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementPayable_757BBAE2FC55545A609EB7083CEEDB27" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income tax receivable agreement payable </link:label>
<link:label id="lab_ara_IncomeTaxReceivableAgreementPayable_757BBAE2FC55545A609EB7083CEEDB27_label_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementPayable_757BBAE2FC55545A609EB7083CEEDB27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Receivable Agreement Payable </link:label>
<link:label id="lab_ara_IncomeTaxReceivableAgreementPayable_757BBAE2FC55545A609EB7083CEEDB27_documentation_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementPayable_757BBAE2FC55545A609EB7083CEEDB27" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Payable under tax receivable agreement noncurrent. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_IncomeTaxReceivableAgreementPayable" xlink:label="loc_ara_IncomeTaxReceivableAgreementPayable_757BBAE2FC55545A609EB7083CEEDB27" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_2BEEA605352B6EE18FE9B7083CEEBBD3_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_2BEEA605352B6EE18FE9B7083CEEBBD3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other long-term liabilities </link:label>
<link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_2BEEA605352B6EE18FE9B7083CEEBBD3_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_2BEEA605352B6EE18FE9B7083CEEBBD3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Liabilities, Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_2BEEA605352B6EE18FE9B7083CEEBBD3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_875D71F548613D3C622BB7083CEFA450_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_875D71F548613D3C622BB7083CEFA450" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Deferred tax liabilities </link:label>
<link:label id="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_875D71F548613D3C622BB7083CEFA450_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_875D71F548613D3C622BB7083CEFA450" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Income Tax Liabilities, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_875D71F548613D3C622BB7083CEFA450" xlink:type="locator"/>
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<link:label id="lab_us-gaap_Liabilities_CC500FCDBC2A7E84F06BB7083CEF740F_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities_CC500FCDBC2A7E84F06BB7083CEF740F" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total liabilities </link:label>
<link:label id="lab_us-gaap_Liabilities_CC500FCDBC2A7E84F06BB7083CEF740F_label_en-US" xlink:label="lab_us-gaap_Liabilities_CC500FCDBC2A7E84F06BB7083CEF740F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_CC500FCDBC2A7E84F06BB7083CEF740F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CommitmentsAndContingencies_39B57F1162AA2B340F19B7083CEF96BA_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_39B57F1162AA2B340F19B7083CEF96BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Commitments and contingencies (Notes 21 and 22) </link:label>
<link:label id="lab_us-gaap_CommitmentsAndContingencies_39B57F1162AA2B340F19B7083CEF96BA_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_39B57F1162AA2B340F19B7083CEF96BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Commitments and Contingencies </link:label>
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<link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_50004A123F47830BE99EB7083CEF757E_verboseLabel_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_50004A123F47830BE99EB7083CEF757E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling interests subject to put provisions </link:label>
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<link:label id="lab_us-gaap_CommonStockValue_9CBC5577A147F9F165BAB7083CF031F7_label_en-US" xlink:label="lab_us-gaap_CommonStockValue_9CBC5577A147F9F165BAB7083CF031F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Common Stock, Value, Issued </link:label>
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<link:label id="lab_us-gaap_AdditionalPaidInCapital_F53FA5ED3D733A21299DB7083CF0B933_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapital_F53FA5ED3D733A21299DB7083CF0B933" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Additional paid-in capital </link:label>
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<link:label id="lab_ara_ReceivableFromNoncontrollingInterest_110C2ED3E6BA4901F5B8B7083CF05D29_terseLabel_en-US" xlink:label="lab_ara_ReceivableFromNoncontrollingInterest_110C2ED3E6BA4901F5B8B7083CF05D29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Receivable from noncontrolling interests </link:label>
<link:label id="lab_ara_ReceivableFromNoncontrollingInterest_110C2ED3E6BA4901F5B8B7083CF05D29_label_en-US" xlink:label="lab_ara_ReceivableFromNoncontrollingInterest_110C2ED3E6BA4901F5B8B7083CF05D29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Receivable From Noncontrolling Interest </link:label>
<link:label id="lab_ara_ReceivableFromNoncontrollingInterest_110C2ED3E6BA4901F5B8B7083CF05D29_documentation_en-US" xlink:label="lab_ara_ReceivableFromNoncontrollingInterest_110C2ED3E6BA4901F5B8B7083CF05D29" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Receivable due from noncontrolling interest. </link:label>
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<link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_D8DB052655C3400E31EFB7083CF1DE3D_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_D8DB052655C3400E31EFB7083CF1DE3D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Retained Earnings (Accumulated Deficit) </link:label>
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<link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_7F5F9FC3517A3DAC3D23B7083CF12EF8_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_7F5F9FC3517A3DAC3D23B7083CF12EF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accumulated Other Comprehensive Income (Loss), Net of Tax </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_7F5F9FC3517A3DAC3D23B7083CF12EF8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockholdersEquity_670338F60AEE2E389638B7083CF1D1C8_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_670338F60AEE2E389638B7083CF1D1C8" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total American Renal Associates Holdings, Inc. deficit </link:label>
<link:label id="lab_us-gaap_StockholdersEquity_670338F60AEE2E389638B7083CF1D1C8_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity_670338F60AEE2E389638B7083CF1D1C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stockholders' Equity Attributable to Parent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_670338F60AEE2E389638B7083CF1D1C8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_MinorityInterest_655297F567F07E2F217DB7083CF1A130_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterest_655297F567F07E2F217DB7083CF1A130" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling interests not subject to put provisions </link:label>
<link:label id="lab_us-gaap_MinorityInterest_655297F567F07E2F217DB7083CF1A130_label_en-US" xlink:label="lab_us-gaap_MinorityInterest_655297F567F07E2F217DB7083CF1A130" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stockholders' Equity Attributable to Noncontrolling Interest </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaap_MinorityInterest_655297F567F07E2F217DB7083CF1A130" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_DBC0F11CAE410982635EB7083CF14F19_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_DBC0F11CAE410982635EB7083CF14F19" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total equity </link:label>
<link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_DBC0F11CAE410982635EB7083CF14F19_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_DBC0F11CAE410982635EB7083CF14F19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_DBC0F11CAE410982635EB7083CF14F19" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_BDAEB1311F77D884C827B7083CF1AD9A_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_BDAEB1311F77D884C827B7083CF1AD9A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities and Equity </link:label>
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<link:label id="lab_us-gaap_DebtInstrumentsAbstract_3917A26F323A41C98B4F958D84A1E9CC_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentsAbstract_3917A26F323A41C98B4F958D84A1E9CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instruments [Abstract] </link:label>
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<link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_7958D610318ED2EA6180958D84A151AA_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_7958D610318ED2EA6180958D84A151AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of long-term debt </link:label>
<link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_7958D610318ED2EA6180958D84A151AA_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_7958D610318ED2EA6180958D84A151AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Long-term Debt Instruments [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_AccountingPoliciesAbstract_F6FF241942D4670A9F11CF5368A7404E_label_en-US" xlink:label="lab_us-gaap_AccountingPoliciesAbstract_F6FF241942D4670A9F11CF5368A7404E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounting Policies [Abstract] </link:label>
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<link:label id="lab_us-gaap_ConsolidationPolicyTextBlock_6940943D95512096E82BCF5368A7DA94_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock_6940943D95512096E82BCF5368A7DA94" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Basis of Presentation and Consolidation </link:label>
<link:label id="lab_us-gaap_ConsolidationPolicyTextBlock_6940943D95512096E82BCF5368A7DA94_label_en-US" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock_6940943D95512096E82BCF5368A7DA94" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Consolidation, Policy [Policy Text Block] </link:label>
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<link:label id="lab_us-gaap_UseOfEstimates_DC92707030E0779AFEAFCF5368A87C7D_terseLabel_en-US" xlink:label="lab_us-gaap_UseOfEstimates_DC92707030E0779AFEAFCF5368A87C7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Use of Estimates </link:label>
<link:label id="lab_us-gaap_UseOfEstimates_DC92707030E0779AFEAFCF5368A87C7D_label_en-US" xlink:label="lab_us-gaap_UseOfEstimates_DC92707030E0779AFEAFCF5368A87C7D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Use of Estimates, Policy [Policy Text Block] </link:label>
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<link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_3C781C03446878536650CF5368A87236_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_3C781C03446878536650CF5368A87236" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Segment Information </link:label>
<link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_3C781C03446878536650CF5368A87236_label_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_3C781C03446878536650CF5368A87236" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Segment Reporting, Policy [Policy Text Block] </link:label>
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<link:label id="lab_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_739E200063DF3568F35FCF5368A8BFDD_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_739E200063DF3568F35FCF5368A8BFDD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Net Patient Service Operating Revenues and Accounts Receivable </link:label>
<link:label id="lab_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_739E200063DF3568F35FCF5368A8BFDD_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_739E200063DF3568F35FCF5368A8BFDD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revenue from Contract with Customer [Policy Text Block] </link:label>
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<link:label id="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_59A0024E7E66AE88021BCF5368A849BD_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_59A0024E7E66AE88021BCF5368A849BD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Contingencies </link:label>
<link:label id="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_59A0024E7E66AE88021BCF5368A849BD_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_59A0024E7E66AE88021BCF5368A849BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Commitments and Contingencies, Policy [Policy Text Block] </link:label>
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<link:label id="lab_us-gaap_FairValueMeasurementPolicyPolicyTextBlock_A370427A2E003A6999BBCF5368A887A2_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementPolicyPolicyTextBlock_A370427A2E003A6999BBCF5368A887A2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value Measurements </link:label>
<link:label id="lab_us-gaap_FairValueMeasurementPolicyPolicyTextBlock_A370427A2E003A6999BBCF5368A887A2_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementPolicyPolicyTextBlock_A370427A2E003A6999BBCF5368A887A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value Measurement, Policy [Policy Text Block] </link:label>
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<link:label id="lab_us-gaap_InventoryPolicyTextBlock_735D7B53195D3C9970B7CF5368A8875D_terseLabel_en-US" xlink:label="lab_us-gaap_InventoryPolicyTextBlock_735D7B53195D3C9970B7CF5368A8875D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Inventories </link:label>
<link:label id="lab_us-gaap_InventoryPolicyTextBlock_735D7B53195D3C9970B7CF5368A8875D_label_en-US" xlink:label="lab_us-gaap_InventoryPolicyTextBlock_735D7B53195D3C9970B7CF5368A8875D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Inventory, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryPolicyTextBlock" xlink:label="loc_us-gaap_InventoryPolicyTextBlock_735D7B53195D3C9970B7CF5368A8875D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_26D615E4CC39EA24DAB3CF5368A823E7_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_26D615E4CC39EA24DAB3CF5368A823E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and Equipment </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_26D615E4CC39EA24DAB3CF5368A823E7_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_26D615E4CC39EA24DAB3CF5368A823E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Policy [Policy Text Block] </link:label>
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<link:label id="lab_us-gaap_IntangibleAssetsFiniteLivedPolicy_8862C1E76C2FCDF488DBCF5368A80402_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsFiniteLivedPolicy_8862C1E76C2FCDF488DBCF5368A80402" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amortizable Intangible Assets </link:label>
<link:label id="lab_us-gaap_IntangibleAssetsFiniteLivedPolicy_8862C1E76C2FCDF488DBCF5368A80402_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsFiniteLivedPolicy_8862C1E76C2FCDF488DBCF5368A80402" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Intangible Assets, Finite-Lived, Policy [Policy Text Block] </link:label>
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<link:label id="lab_ara_GoodwillAndIntangibleAssetsIntangibleAssetsGoodwillAndIndefiniteLivedPolicyPolicyTextBlock_5D3912348ADB9F15CF00CF5368A89E1A_terseLabel_en-US" xlink:label="lab_ara_GoodwillAndIntangibleAssetsIntangibleAssetsGoodwillAndIndefiniteLivedPolicyPolicyTextBlock_5D3912348ADB9F15CF00CF5368A89E1A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Identified Non Amortizable Intangible Assets and Goodwill </link:label>
<link:label id="lab_ara_GoodwillAndIntangibleAssetsIntangibleAssetsGoodwillAndIndefiniteLivedPolicyPolicyTextBlock_5D3912348ADB9F15CF00CF5368A89E1A_label_en-US" xlink:label="lab_ara_GoodwillAndIntangibleAssetsIntangibleAssetsGoodwillAndIndefiniteLivedPolicyPolicyTextBlock_5D3912348ADB9F15CF00CF5368A89E1A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Goodwill and Intangible Assets, Intangible Assets, Goodwill And Indefinite-Lived, Policy [Policy Text Block] </link:label>
<link:label id="lab_ara_GoodwillAndIntangibleAssetsIntangibleAssetsGoodwillAndIndefiniteLivedPolicyPolicyTextBlock_5D3912348ADB9F15CF00CF5368A89E1A_documentation_en-US" xlink:label="lab_ara_GoodwillAndIntangibleAssetsIntangibleAssetsGoodwillAndIndefiniteLivedPolicyPolicyTextBlock_5D3912348ADB9F15CF00CF5368A89E1A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Disclosure of accounting policy for goodwill. This accounting policy also may address how an entity assesses and measures impairment of goodwill, how reporting units are determined, how goodwill is allocated to such units, and how the fair values of the reporting units are determined and disclosure of accounting policy for indefinite-lived intangible assets (that is, those intangible assets not subject to amortization). This accounting policy also may address how the entity assesses whether events and circumstances continue to support an indefinite useful life and how the entity assesses and measures impairment of such assets. </link:label>
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<link:label id="lab_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_66A50AF4C3BD03F0ED7DCF5368A815E2_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_66A50AF4C3BD03F0ED7DCF5368A815E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Impairment of Long-Lived Assets </link:label>
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<link:label id="lab_ara_AssetsHeldForSalePolicyTextBlock_CB3A512BEE8279A2D9A9CF65B80CB773_terseLabel_en-US" xlink:label="lab_ara_AssetsHeldForSalePolicyTextBlock_CB3A512BEE8279A2D9A9CF65B80CB773" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Assets Held for Sale </link:label>
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<link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_00BD2C6F51047D9197D3CF5368A9930C_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock_00BD2C6F51047D9197D3CF5368A9930C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income Taxes </link:label>
<link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_00BD2C6F51047D9197D3CF5368A9930C_label_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock_00BD2C6F51047D9197D3CF5368A9930C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax, Policy [Policy Text Block] </link:label>
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<link:label id="lab_ara_NoncontrollingInterestPolicyPolicyTextBlock_B1700F711D7B2BCC3741CF5368A90748_terseLabel_en-US" xlink:label="lab_ara_NoncontrollingInterestPolicyPolicyTextBlock_B1700F711D7B2BCC3741CF5368A90748" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interests </link:label>
<link:label id="lab_ara_NoncontrollingInterestPolicyPolicyTextBlock_B1700F711D7B2BCC3741CF5368A90748_label_en-US" xlink:label="lab_ara_NoncontrollingInterestPolicyPolicyTextBlock_B1700F711D7B2BCC3741CF5368A90748" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest Policy [Policy Text Block] </link:label>
<link:label id="lab_ara_NoncontrollingInterestPolicyPolicyTextBlock_B1700F711D7B2BCC3741CF5368A90748_documentation_en-US" xlink:label="lab_ara_NoncontrollingInterestPolicyPolicyTextBlock_B1700F711D7B2BCC3741CF5368A90748" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> The policy for noncontrolling interest in consolidated subsidiaries. </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_E78C779018ED0C2D6A80CF5368A9D48D_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_E78C779018ED0C2D6A80CF5368A9D48D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Stock-Based Compensation </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_E78C779018ED0C2D6A80CF5368A9D48D_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_E78C779018ED0C2D6A80CF5368A9D48D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement [Policy Text Block] </link:label>
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<link:label id="lab_ara_InterestRateSwapsPolicyPolicyTextBlock_0BBA890E18561776304ECF5368A90BFF_terseLabel_en-US" xlink:label="lab_ara_InterestRateSwapsPolicyPolicyTextBlock_0BBA890E18561776304ECF5368A90BFF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest Rate Swap and Cap Agreements </link:label>
<link:label id="lab_ara_InterestRateSwapsPolicyPolicyTextBlock_0BBA890E18561776304ECF5368A90BFF_label_en-US" xlink:label="lab_ara_InterestRateSwapsPolicyPolicyTextBlock_0BBA890E18561776304ECF5368A90BFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Interest Rate Swaps, Policy [Policy Text Block] </link:label>
<link:label id="lab_ara_InterestRateSwapsPolicyPolicyTextBlock_0BBA890E18561776304ECF5368A90BFF_documentation_en-US" xlink:label="lab_ara_InterestRateSwapsPolicyPolicyTextBlock_0BBA890E18561776304ECF5368A90BFF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> The policy of entity on interest rate swaps. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_InterestRateSwapsPolicyPolicyTextBlock" xlink:label="loc_ara_InterestRateSwapsPolicyPolicyTextBlock_0BBA890E18561776304ECF5368A90BFF" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_D80A412480719229ECC4CF5368A9A84F_terseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_D80A412480719229ECC4CF5368A9A84F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Recent Accounting Pronouncements </link:label>
<link:label id="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_D80A412480719229ECC4CF5368A9A84F_label_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_D80A412480719229ECC4CF5368A9A84F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> New Accounting Pronouncements, Policy [Policy Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_D80A412480719229ECC4CF5368A9A84F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_BusinessCombinationsAbstract_95018B0A9BF9372E5CF2958D8515B69A_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract_95018B0A9BF9372E5CF2958D8515B69A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Business Combinations [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_95018B0A9BF9372E5CF2958D8515B69A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_7C81E22C7DD71104EE46958D85155EA2_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_7C81E22C7DD71104EE46958D85155EA2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of allocation of purchase price to the acquired assets </link:label>
<link:label id="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_7C81E22C7DD71104EE46958D85155EA2_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_7C81E22C7DD71104EE46958D85155EA2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_7C81E22C7DD71104EE46958D85155EA2" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_5500C6A2C711D188F5C8958D84C69BA6_label_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_5500C6A2C711D188F5C8958D84C69BA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Payable and Accrued Liabilities, Current [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAbstract_5500C6A2C711D188F5C8958D84C69BA6" xlink:type="locator"/>
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<link:label id="lab_ara_ScheduleOfEmployeeRelatedLiabilitiesTableTextBlock_F2FB98B991A898D722B5958D84C6F568_terseLabel_en-US" xlink:label="lab_ara_ScheduleOfEmployeeRelatedLiabilitiesTableTextBlock_F2FB98B991A898D722B5958D84C6F568" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Summary of accrued compensation and benefits </link:label>
<link:label id="lab_ara_ScheduleOfEmployeeRelatedLiabilitiesTableTextBlock_F2FB98B991A898D722B5958D84C6F568_label_en-US" xlink:label="lab_ara_ScheduleOfEmployeeRelatedLiabilitiesTableTextBlock_F2FB98B991A898D722B5958D84C6F568" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule Of Employee Related Liabilities [Table Text Block] </link:label>
<link:label id="lab_ara_ScheduleOfEmployeeRelatedLiabilitiesTableTextBlock_F2FB98B991A898D722B5958D84C6F568_documentation_en-US" xlink:label="lab_ara_ScheduleOfEmployeeRelatedLiabilitiesTableTextBlock_F2FB98B991A898D722B5958D84C6F568" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Schedule Of Employee Related Liabilities [Table Text Block] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_ScheduleOfEmployeeRelatedLiabilitiesTableTextBlock" xlink:label="loc_ara_ScheduleOfEmployeeRelatedLiabilitiesTableTextBlock_F2FB98B991A898D722B5958D84C6F568" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_3C695497160172BEDB64958D84C6A386_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_3C695497160172BEDB64958D84C6A386" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Summary of accrued expenses and other current liabilities </link:label>
<link:label id="lab_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_3C695497160172BEDB64958D84C6A386_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_3C695497160172BEDB64958D84C6A386" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Accrued Liabilities [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_3C695497160172BEDB64958D84C6A386" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_3C695497160172BEDB64958D84C6A386" xlink:to="lab_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_3C695497160172BEDB64958D84C6A386" xlink:type="arc"/>
<link:label id="lab_us-gaap_OtherCurrentAssetsTextBlock_2699C40A627AB5DAC2BA958D8515EC1F_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCurrentAssetsTextBlock_2699C40A627AB5DAC2BA958D8515EC1F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Prepaid Expenses and Other Current Assets </link:label>
<link:label id="lab_us-gaap_OtherCurrentAssetsTextBlock_2699C40A627AB5DAC2BA958D8515EC1F_label_en-US" xlink:label="lab_us-gaap_OtherCurrentAssetsTextBlock_2699C40A627AB5DAC2BA958D8515EC1F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Current Assets [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCurrentAssetsTextBlock" xlink:label="loc_us-gaap_OtherCurrentAssetsTextBlock_2699C40A627AB5DAC2BA958D8515EC1F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LeasesAbstract_A95F64908CB6E914905E958D846311EB_label_en-US" xlink:label="lab_us-gaap_LeasesAbstract_A95F64908CB6E914905E958D846311EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Leases [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:label="loc_us-gaap_LeasesAbstract_A95F64908CB6E914905E958D846311EB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LeasesOfLessorDisclosureTextBlock_08EA9061298304784E83958D84631D0A_terseLabel_en-US" xlink:label="lab_us-gaap_LeasesOfLessorDisclosureTextBlock_08EA9061298304784E83958D84631D0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Leases </link:label>
<link:label id="lab_us-gaap_LeasesOfLessorDisclosureTextBlock_08EA9061298304784E83958D84631D0A_label_en-US" xlink:label="lab_us-gaap_LeasesOfLessorDisclosureTextBlock_08EA9061298304784E83958D84631D0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Leases of Lessor Disclosure [Text Block] </link:label>
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<link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_407F80A6EE469532CFBBAA6784C8E13C_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract_407F80A6EE469532CFBBAA6784C8E13C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Disclosure [Abstract] </link:label>
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<link:label id="lab_us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefitAbstract_16223DD2A7CACDFC0980AA6784C87E64_terseLabel_en-US" xlink:label="lab_us-gaap_CurrentFederalStateAndLocalTaxExpenseBenefitAbstract_16223DD2A7CACDFC0980AA6784C87E64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Current: </link:label>
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<link:label id="lab_us-gaap_StatementEquityComponentsAxis_10701946B08F813E8240B7083B30A822_label_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis_10701946B08F813E8240B7083B30A822" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Equity Components [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_10701946B08F813E8240B7083B30A822" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_10701946B08F813E8240B7083B30A822" xlink:to="lab_us-gaap_StatementEquityComponentsAxis_10701946B08F813E8240B7083B30A822" xlink:type="arc"/>
<link:label id="lab_us-gaap_EquityComponentDomain_41E077CCBE09EA42DEE1B7083B30B15B_terseLabel_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_41E077CCBE09EA42DEE1B7083B30B15B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Equity Component [Domain] </link:label>
<link:label id="lab_us-gaap_EquityComponentDomain_41E077CCBE09EA42DEE1B7083B30B15B_label_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_41E077CCBE09EA42DEE1B7083B30B15B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Equity Component [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_41E077CCBE09EA42DEE1B7083B30B15B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityComponentDomain_41E077CCBE09EA42DEE1B7083B30B15B" xlink:to="lab_us-gaap_EquityComponentDomain_41E077CCBE09EA42DEE1B7083B30B15B" xlink:type="arc"/>
<link:label id="lab_ara_NoncontrollingInterestPutProvisionMember_7B41A0BF2ADC15FBCEEDB7083B309437_terseLabel_en-US" xlink:label="lab_ara_NoncontrollingInterestPutProvisionMember_7B41A0BF2ADC15FBCEEDB7083B309437" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interests subject to put provisions </link:label>
<link:label id="lab_ara_NoncontrollingInterestPutProvisionMember_7B41A0BF2ADC15FBCEEDB7083B309437_label_en-US" xlink:label="lab_ara_NoncontrollingInterestPutProvisionMember_7B41A0BF2ADC15FBCEEDB7083B309437" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest Put Provision [Member] </link:label>
<link:label id="lab_ara_NoncontrollingInterestPutProvisionMember_7B41A0BF2ADC15FBCEEDB7083B309437_documentation_en-US" xlink:label="lab_ara_NoncontrollingInterestPutProvisionMember_7B41A0BF2ADC15FBCEEDB7083B309437" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents noncontrolling interests subject to put provisions </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_NoncontrollingInterestPutProvisionMember" xlink:label="loc_ara_NoncontrollingInterestPutProvisionMember_7B41A0BF2ADC15FBCEEDB7083B309437" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_NoncontrollingInterestPutProvisionMember_7B41A0BF2ADC15FBCEEDB7083B309437" xlink:to="lab_ara_NoncontrollingInterestPutProvisionMember_7B41A0BF2ADC15FBCEEDB7083B309437" xlink:type="arc"/>
<link:label id="lab_us-gaap_TemporaryEquityLineItems_8A76B1F21744FE3453E6B7083B315833_terseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquityLineItems_8A76B1F21744FE3453E6B7083B315833" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> NONCONTROLLING INTERESTS SUBJECT TO PUT PROVISIONS </link:label>
<link:label id="lab_us-gaap_TemporaryEquityLineItems_8A76B1F21744FE3453E6B7083B315833_label_en-US" xlink:label="lab_us-gaap_TemporaryEquityLineItems_8A76B1F21744FE3453E6B7083B315833" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Temporary Equity [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TemporaryEquityLineItems" xlink:label="loc_us-gaap_TemporaryEquityLineItems_8A76B1F21744FE3453E6B7083B315833" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TemporaryEquityLineItems_8A76B1F21744FE3453E6B7083B315833" xlink:to="lab_us-gaap_TemporaryEquityLineItems_8A76B1F21744FE3453E6B7083B315833" xlink:type="arc"/>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput_BB7A699EEAD7D0E094EAB7083B31EDF5_terseLabel_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput_BB7A699EEAD7D0E094EAB7083B31EDF5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average cost of capital </link:label>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput_BB7A699EEAD7D0E094EAB7083B31EDF5_label_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput_BB7A699EEAD7D0E094EAB7083B31EDF5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Redeemable Noncontrolling Interest, Equity, Fair Value, Measurement Input </link:label>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput_BB7A699EEAD7D0E094EAB7083B31EDF5_documentation_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput_BB7A699EEAD7D0E094EAB7083B31EDF5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Redeemable Noncontrolling Interest, Equity, Fair Value, Measurement Input </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput" xlink:label="loc_ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput_BB7A699EEAD7D0E094EAB7083B31EDF5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput_BB7A699EEAD7D0E094EAB7083B31EDF5" xlink:to="lab_ara_RedeemableNoncontrollingInterestEquityFairValueMeasurementInput_BB7A699EEAD7D0E094EAB7083B31EDF5" xlink:type="arc"/>
<link:label id="lab_ara_PotentialObligationsUnderTimeBasedPutProvisions_46A1BD69C7895310F439B7083B32D916_terseLabel_en-US" xlink:label="lab_ara_PotentialObligationsUnderTimeBasedPutProvisions_46A1BD69C7895310F439B7083B32D916" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Potential obligations under time based put provisions </link:label>
<link:label id="lab_ara_PotentialObligationsUnderTimeBasedPutProvisions_46A1BD69C7895310F439B7083B32D916_label_en-US" xlink:label="lab_ara_PotentialObligationsUnderTimeBasedPutProvisions_46A1BD69C7895310F439B7083B32D916" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Potential Obligations Under Time Based Put Provisions </link:label>
<link:label id="lab_ara_PotentialObligationsUnderTimeBasedPutProvisions_46A1BD69C7895310F439B7083B32D916_documentation_en-US" xlink:label="lab_ara_PotentialObligationsUnderTimeBasedPutProvisions_46A1BD69C7895310F439B7083B32D916" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of potential obligation under time based put provisions. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_PotentialObligationsUnderTimeBasedPutProvisions" xlink:label="loc_ara_PotentialObligationsUnderTimeBasedPutProvisions_46A1BD69C7895310F439B7083B32D916" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_PotentialObligationsUnderTimeBasedPutProvisions_46A1BD69C7895310F439B7083B32D916" xlink:to="lab_ara_PotentialObligationsUnderTimeBasedPutProvisions_46A1BD69C7895310F439B7083B32D916" xlink:type="arc"/>
<link:label id="lab_ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions_123DB0ECECE5FD25F45EB7083B32F5A0_terseLabel_en-US" xlink:label="lab_ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions_123DB0ECECE5FD25F45EB7083B32F5A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Potential additional obligations under event based put provisions </link:label>
<link:label id="lab_ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions_123DB0ECECE5FD25F45EB7083B32F5A0_label_en-US" xlink:label="lab_ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions_123DB0ECECE5FD25F45EB7083B32F5A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Potential Additional Obligations Under Event Based Put Provisions </link:label>
<link:label id="lab_ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions_123DB0ECECE5FD25F45EB7083B32F5A0_documentation_en-US" xlink:label="lab_ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions_123DB0ECECE5FD25F45EB7083B32F5A0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of potential additional obligations under event based put provisions. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions" xlink:label="loc_ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions_123DB0ECECE5FD25F45EB7083B32F5A0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions_123DB0ECECE5FD25F45EB7083B32F5A0" xlink:to="lab_ara_PotentialAdditionalObligationsUnderEventBasedPutProvisions_123DB0ECECE5FD25F45EB7083B32F5A0" xlink:type="arc"/>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue_73491E4F40AD9C1A07ECB7083B32C2F8_totalLabel_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue_73491E4F40AD9C1A07ECB7083B32C2F8" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Redemption value </link:label>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue_73491E4F40AD9C1A07ECB7083B32C2F8_label_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue_73491E4F40AD9C1A07ECB7083B32C2F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Redeemable Noncontrolling Interest, Equity, Accelerated Portion, Redemption Value </link:label>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue_73491E4F40AD9C1A07ECB7083B32C2F8_documentation_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue_73491E4F40AD9C1A07ECB7083B32C2F8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Redeemable Noncontrolling Interest, Equity, Accelerated Portion, Redemption Value </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue" xlink:label="loc_ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue_73491E4F40AD9C1A07ECB7083B32C2F8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue_73491E4F40AD9C1A07ECB7083B32C2F8" xlink:to="lab_ara_RedeemableNoncontrollingInterestEquityAcceleratedPortionRedemptionValue_73491E4F40AD9C1A07ECB7083B32C2F8" xlink:type="arc"/>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion_847814E5816E52A9A866B7083B32A56A_terseLabel_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion_847814E5816E52A9A866B7083B32A56A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Estimated fair values for accounting purposes </link:label>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion_847814E5816E52A9A866B7083B32A56A_label_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion_847814E5816E52A9A866B7083B32A56A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Redeemable Noncontrolling Interest, Equity, Fair Value, Accelerated Portion </link:label>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion_847814E5816E52A9A866B7083B32A56A_documentation_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion_847814E5816E52A9A866B7083B32A56A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Redeemable Noncontrolling Interest, Equity, Fair Value, Accelerated Portion </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion" xlink:label="loc_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion_847814E5816E52A9A866B7083B32A56A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion_847814E5816E52A9A866B7083B32A56A" xlink:to="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortion_847814E5816E52A9A866B7083B32A56A" xlink:type="arc"/>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment_870860475176D323F979B7083B32A695_terseLabel_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment_870860475176D323F979B7083B32A695" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Difference between the redemption value and estimated fair value for accounting purposes of the related noncontrolling interests </link:label>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment_870860475176D323F979B7083B32A695_label_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment_870860475176D323F979B7083B32A695" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Redeemable Noncontrolling Interest, Equity, Fair Value, Accelerated Portion, Fair Value Adjustment </link:label>
<link:label id="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment_870860475176D323F979B7083B32A695_documentation_en-US" xlink:label="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment_870860475176D323F979B7083B32A695" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Redeemable Noncontrolling Interest, Equity, Fair Value, Accelerated Portion, Fair Value Adjustment </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment" xlink:label="loc_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment_870860475176D323F979B7083B32A695" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment_870860475176D323F979B7083B32A695" xlink:to="lab_ara_RedeemableNoncontrollingInterestEquityFairValueAcceleratedPortionFairValueAdjustment_870860475176D323F979B7083B32A695" xlink:type="arc"/>
<link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_D5CEBE39DDEB64A76048B7083B328CEE_terseLabel_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_D5CEBE39DDEB64A76048B7083B328CEE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling interest subject to put provisions - estimated fair values </link:label>
<link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_D5CEBE39DDEB64A76048B7083B328CEE_label_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_D5CEBE39DDEB64A76048B7083B328CEE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Redeemable Noncontrolling Interest, Equity, Fair Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityFairValue" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_D5CEBE39DDEB64A76048B7083B328CEE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_D5CEBE39DDEB64A76048B7083B328CEE" xlink:to="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_D5CEBE39DDEB64A76048B7083B328CEE" xlink:type="arc"/>
<link:label id="lab_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_663F97A5CDB864C6CB33B7083B332A09_totalLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_663F97A5CDB864C6CB33B7083B332A09" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling interests subject to put provisions - maximum redemption value </link:label>
<link:label id="lab_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_663F97A5CDB864C6CB33B7083B332A09_label_en-US" xlink:label="lab_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_663F97A5CDB864C6CB33B7083B332A09" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_663F97A5CDB864C6CB33B7083B332A09" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_663F97A5CDB864C6CB33B7083B332A09" xlink:to="lab_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_663F97A5CDB864C6CB33B7083B332A09" xlink:type="arc"/>
<link:label id="lab_us-gaap_TemporaryEquityAccretionToRedemptionValue_3A8E493DB29A21823D4DB7083B338754_terseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquityAccretionToRedemptionValue_3A8E493DB29A21823D4DB7083B338754" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Change in estimated fair values for accounting purposes </link:label>
<link:label id="lab_us-gaap_TemporaryEquityAccretionToRedemptionValue_3A8E493DB29A21823D4DB7083B338754_label_en-US" xlink:label="lab_us-gaap_TemporaryEquityAccretionToRedemptionValue_3A8E493DB29A21823D4DB7083B338754" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Temporary Equity, Accretion to Redemption Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TemporaryEquityAccretionToRedemptionValue" xlink:label="loc_us-gaap_TemporaryEquityAccretionToRedemptionValue_3A8E493DB29A21823D4DB7083B338754" xlink:type="locator"/>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_6F99D95B3BE1934CD561958D8667F8CE" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PreferredStockParOrStatedValuePerShare_D55DB6941C37975E0692958D8667CC67_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockParOrStatedValuePerShare_D55DB6941C37975E0692958D8667CC67" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Preferred stock, par value (in USD per share) </link:label>
<link:label id="lab_us-gaap_PreferredStockParOrStatedValuePerShare_D55DB6941C37975E0692958D8667CC67_label_en-US" xlink:label="lab_us-gaap_PreferredStockParOrStatedValuePerShare_D55DB6941C37975E0692958D8667CC67" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Preferred Stock, Par or Stated Value Per Share </link:label>
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<link:label id="lab_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_6B06EA63A335E108DD59958D84B6AB98_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_6B06EA63A335E108DD59958D84B6AB98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesAbstract" xlink:label="loc_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_6B06EA63A335E108DD59958D84B6AB98" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_6B06EA63A335E108DD59958D84B6AB98" xlink:to="lab_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesAbstract_6B06EA63A335E108DD59958D84B6AB98" xlink:type="arc"/>
<link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_81F4A257266A04C9EE36958D84B600C7_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_81F4A257266A04C9EE36958D84B600C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total assets of VIEs </link:label>
<link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_81F4A257266A04C9EE36958D84B600C7_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_81F4A257266A04C9EE36958D84B600C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Variable Interest Entity, Consolidated, Carrying Amount, Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets" xlink:label="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets_81F4A257266A04C9EE36958D84B600C7" xlink:type="locator"/>
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<link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_F343583A652B42E8CE02958D84B61CB2_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_F343583A652B42E8CE02958D84B61CB2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total liabilities of VIEs </link:label>
<link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_F343583A652B42E8CE02958D84B61CB2_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_F343583A652B42E8CE02958D84B61CB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Variable Interest Entity, Consolidated, Carrying Amount, Liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities" xlink:label="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities_F343583A652B42E8CE02958D84B61CB2" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_7339DFAAC1CFDBC333B1CF5367AB6284_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_7339DFAAC1CFDBC333B1CF5367AB6284" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Measurement Frequency [Axis] </link:label>
<link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_7339DFAAC1CFDBC333B1CF5367AB6284_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_7339DFAAC1CFDBC333B1CF5367AB6284" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Measurement Frequency [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_7339DFAAC1CFDBC333B1CF5367AB6284" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_7339DFAAC1CFDBC333B1CF5367AB6284" xlink:to="lab_us-gaap_FairValueByMeasurementFrequencyAxis_7339DFAAC1CFDBC333B1CF5367AB6284" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueMeasurementFrequencyDomain_8823EC8C7C5C3A80B5A1CF5367AB129B_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain_8823EC8C7C5C3A80B5A1CF5367AB129B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Measurement Frequency [Domain] </link:label>
<link:label id="lab_us-gaap_FairValueMeasurementFrequencyDomain_8823EC8C7C5C3A80B5A1CF5367AB129B_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain_8823EC8C7C5C3A80B5A1CF5367AB129B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Measurement Frequency [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_8823EC8C7C5C3A80B5A1CF5367AB129B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_8823EC8C7C5C3A80B5A1CF5367AB129B" xlink:to="lab_us-gaap_FairValueMeasurementFrequencyDomain_8823EC8C7C5C3A80B5A1CF5367AB129B" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueMeasurementsRecurringMember_A25A13FD587EDBDFB634CF5367AB6452_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_A25A13FD587EDBDFB634CF5367AB6452" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Recurring basis </link:label>
<link:label id="lab_us-gaap_FairValueMeasurementsRecurringMember_A25A13FD587EDBDFB634CF5367AB6452_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_A25A13FD587EDBDFB634CF5367AB6452" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Recurring [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_A25A13FD587EDBDFB634CF5367AB6452" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsRecurringMember_A25A13FD587EDBDFB634CF5367AB6452" xlink:to="lab_us-gaap_FairValueMeasurementsRecurringMember_A25A13FD587EDBDFB634CF5367AB6452" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_D003CD5B18ABC650113FCF5367ACFCE9_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_D003CD5B18ABC650113FCF5367ACFCE9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value Hierarchy and NAV [Axis] </link:label>
<link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_D003CD5B18ABC650113FCF5367ACFCE9_label_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_D003CD5B18ABC650113FCF5367ACFCE9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value Hierarchy and NAV [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_D003CD5B18ABC650113FCF5367ACFCE9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_D003CD5B18ABC650113FCF5367ACFCE9" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_D003CD5B18ABC650113FCF5367ACFCE9" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8B7FFB5F6CA74E17CF63CF5367AC685C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8B7FFB5F6CA74E17CF63CF5367AC685C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Fair Value Hierarchy and NAV [Domain] </link:label>
<link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8B7FFB5F6CA74E17CF63CF5367AC685C_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8B7FFB5F6CA74E17CF63CF5367AC685C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value Hierarchy and NAV [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8B7FFB5F6CA74E17CF63CF5367AC685C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8B7FFB5F6CA74E17CF63CF5367AC685C" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8B7FFB5F6CA74E17CF63CF5367AC685C" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueInputsLevel1Member_2F5D1FA73F7582C50C30CF5367AC1D9C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_2F5D1FA73F7582C50C30CF5367AC1D9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Level 1 </link:label>
<link:label id="lab_us-gaap_FairValueInputsLevel1Member_2F5D1FA73F7582C50C30CF5367AC1D9C_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_2F5D1FA73F7582C50C30CF5367AC1D9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Inputs, Level 1 [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_2F5D1FA73F7582C50C30CF5367AC1D9C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member_2F5D1FA73F7582C50C30CF5367AC1D9C" xlink:to="lab_us-gaap_FairValueInputsLevel1Member_2F5D1FA73F7582C50C30CF5367AC1D9C" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueInputsLevel2Member_D688C0269BF829C1A999CF5367ACCC70_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_D688C0269BF829C1A999CF5367ACCC70" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Level 2 </link:label>
<link:label id="lab_us-gaap_FairValueInputsLevel2Member_D688C0269BF829C1A999CF5367ACCC70_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_D688C0269BF829C1A999CF5367ACCC70" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Inputs, Level 2 [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_D688C0269BF829C1A999CF5367ACCC70" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel2Member_D688C0269BF829C1A999CF5367ACCC70" xlink:to="lab_us-gaap_FairValueInputsLevel2Member_D688C0269BF829C1A999CF5367ACCC70" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueInputsLevel3Member_E4FB4B541664F2DF06A6CF5367AD7EE8_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_E4FB4B541664F2DF06A6CF5367AD7EE8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Level 3 </link:label>
<link:label id="lab_us-gaap_FairValueInputsLevel3Member_E4FB4B541664F2DF06A6CF5367AD7EE8_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_E4FB4B541664F2DF06A6CF5367AD7EE8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Inputs, Level 3 [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_E4FB4B541664F2DF06A6CF5367AD7EE8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member_E4FB4B541664F2DF06A6CF5367AD7EE8" xlink:to="lab_us-gaap_FairValueInputsLevel3Member_E4FB4B541664F2DF06A6CF5367AD7EE8" xlink:type="arc"/>
<link:label id="lab_us-gaap_BalanceSheetLocationAxis_0F06675377FFD3C91C58CF5367AD1A1E_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis_0F06675377FFD3C91C58CF5367AD1A1E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Balance Sheet Location [Axis] </link:label>
<link:label id="lab_us-gaap_BalanceSheetLocationAxis_0F06675377FFD3C91C58CF5367AD1A1E_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis_0F06675377FFD3C91C58CF5367AD1A1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Balance Sheet Location [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_0F06675377FFD3C91C58CF5367AD1A1E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_BalanceSheetLocationDomain_6BF5BFE9A6981C138AB9CF5367AD0E25_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_6BF5BFE9A6981C138AB9CF5367AD0E25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Balance Sheet Location [Domain] </link:label>
<link:label id="lab_us-gaap_BalanceSheetLocationDomain_6BF5BFE9A6981C138AB9CF5367AD0E25_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_6BF5BFE9A6981C138AB9CF5367AD0E25" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Balance Sheet Location [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_6BF5BFE9A6981C138AB9CF5367AD0E25" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_D4140400F113E654D6D3CF5367ADB1A2_verboseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_D4140400F113E654D6D3CF5367ADB1A2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate derivative agreements (included in Prepaid expenses and other current assets) </link:label>
<link:label id="lab_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_D4140400F113E654D6D3CF5367ADB1A2_label_en-US" xlink:label="lab_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_D4140400F113E654D6D3CF5367ADB1A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Prepaid Expenses and Other Current Assets [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_D4140400F113E654D6D3CF5367ADB1A2" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherNoncurrentAssetsMember_94E408FFB8326EE6621DCF5367ADB934_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherNoncurrentAssetsMember_94E408FFB8326EE6621DCF5367ADB934" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate derivative agreements (included in Other long-term assets) </link:label>
<link:label id="lab_us-gaap_OtherNoncurrentAssetsMember_94E408FFB8326EE6621DCF5367ADB934_label_en-US" xlink:label="lab_us-gaap_OtherNoncurrentAssetsMember_94E408FFB8326EE6621DCF5367ADB934" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Noncurrent Assets [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncurrentAssetsMember" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_94E408FFB8326EE6621DCF5367ADB934" xlink:type="locator"/>
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<link:label id="lab_ara_IncomeTaxReceivableAgreementPayableMember_C261181B4B785D56E05CCF5367AD5D17_terseLabel_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementPayableMember_C261181B4B785D56E05CCF5367AD5D17" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Tax Receivable Agreement Liability (included in Income tax receivable agreement payable) </link:label>
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<link:label id="lab_ara_IncomeTaxReceivableAgreementPayableMember_C261181B4B785D56E05CCF5367AD5D17_documentation_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementPayableMember_C261181B4B785D56E05CCF5367AD5D17" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Primary financial statement caption encompassing income tax receivable agreement payable. </link:label>
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<link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesMember_A7875B2E867660F0C7F5CF5367AEFD55_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesMember_A7875B2E867660F0C7F5CF5367AEFD55" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate derivative agreements (included in Accrued expense and other current liabilities) </link:label>
<link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesMember_A7875B2E867660F0C7F5CF5367AEFD55_label_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesMember_A7875B2E867660F0C7F5CF5367AEFD55" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Payable and Accrued Liabilities [Member] </link:label>
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<link:label id="lab_us-gaap_OtherNoncurrentLiabilitiesMember_088AB0D52EA9C11B24CFCF5367AEEF4D_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNoncurrentLiabilitiesMember_088AB0D52EA9C11B24CFCF5367AEEF4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate derivative agreements (included in Other long-term liabilities) </link:label>
<link:label id="lab_us-gaap_OtherNoncurrentLiabilitiesMember_088AB0D52EA9C11B24CFCF5367AEEF4D_label_en-US" xlink:label="lab_us-gaap_OtherNoncurrentLiabilitiesMember_088AB0D52EA9C11B24CFCF5367AEEF4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Noncurrent Liabilities [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_088AB0D52EA9C11B24CFCF5367AEEF4D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2AAF9AFB302453409444CF5367AEB4B4_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2AAF9AFB302453409444CF5367AEB4B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> FAIR VALUE MEASUREMENTS </link:label>
<link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2AAF9AFB302453409444CF5367AEB4B4_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2AAF9AFB302453409444CF5367AEB4B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2AAF9AFB302453409444CF5367AEB4B4" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DerivativeAssets_08C4F8E469EE1AA3FDC1CF5367AE8299_label_en-US" xlink:label="lab_us-gaap_DerivativeAssets_08C4F8E469EE1AA3FDC1CF5367AE8299" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Derivative Asset </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeAssets" xlink:label="loc_us-gaap_DerivativeAssets_08C4F8E469EE1AA3FDC1CF5367AE8299" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations_A172A4B5ABB35656516ECF5367AEF451_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations_A172A4B5ABB35656516ECF5367AEF451" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Tax Receivable Agreement Liability (included in Income tax receivable agreement payable) </link:label>
<link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations_A172A4B5ABB35656516ECF5367AEF451_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations_A172A4B5ABB35656516ECF5367AEF451" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Obligations, Fair Value Disclosure </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisObligations_A172A4B5ABB35656516ECF5367AEF451" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DerivativeLiabilities_E3811FF4881494449E27CF5367AFBF67_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities_E3811FF4881494449E27CF5367AFBF67" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate swap agreements liability </link:label>
<link:label id="lab_us-gaap_DerivativeLiabilities_E3811FF4881494449E27CF5367AFBF67_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities_E3811FF4881494449E27CF5367AFBF67" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Derivative Liability </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeLiabilities" xlink:label="loc_us-gaap_DerivativeLiabilities_E3811FF4881494449E27CF5367AFBF67" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FinancialLiabilitiesFairValueDisclosure_9DDBB07AB284625B01E8CF5367AF0C98_totalLabel_en-US" xlink:label="lab_us-gaap_FinancialLiabilitiesFairValueDisclosure_9DDBB07AB284625B01E8CF5367AF0C98" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total Liabilities </link:label>
<link:label id="lab_us-gaap_FinancialLiabilitiesFairValueDisclosure_9DDBB07AB284625B01E8CF5367AF0C98_label_en-US" xlink:label="lab_us-gaap_FinancialLiabilitiesFairValueDisclosure_9DDBB07AB284625B01E8CF5367AF0C98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Financial Liabilities Fair Value Disclosure </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_9DDBB07AB284625B01E8CF5367AF0C98" xlink:type="locator"/>
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<link:label id="lab_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_AEEB57CAB40D24327170CF5367AFB969_terseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_AEEB57CAB40D24327170CF5367AFB969" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling interests subject to put provisions </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_AEEB57CAB40D24327170CF5367AFB969" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DebtDisclosureTextBlock_1B1BE1F7CCC7F647F8CE958D84A4D81C_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock_1B1BE1F7CCC7F647F8CE958D84A4D81C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt </link:label>
<link:label id="lab_us-gaap_DebtDisclosureTextBlock_1B1BE1F7CCC7F647F8CE958D84A4D81C_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock_1B1BE1F7CCC7F647F8CE958D84A4D81C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Disclosure [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_1B1BE1F7CCC7F647F8CE958D84A4D81C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CompensationAndRetirementDisclosureAbstract_7AAC53CA7B7CFD0286ED958D83B78FA7_label_en-US" xlink:label="lab_us-gaap_CompensationAndRetirementDisclosureAbstract_7AAC53CA7B7CFD0286ED958D83B78FA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Retirement Benefits [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:label="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_7AAC53CA7B7CFD0286ED958D83B78FA7" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_4E6F919628B5A7D80CEF958D83B77BEA_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_4E6F919628B5A7D80CEF958D83B77BEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Contributions made to plan </link:label>
<link:label id="lab_us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_4E6F919628B5A7D80CEF958D83B77BEA_label_en-US" xlink:label="lab_us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_4E6F919628B5A7D80CEF958D83B77BEA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Defined Contribution Plan, Employer Discretionary Contribution Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_4E6F919628B5A7D80CEF958D83B77BEA" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentAbstract_99419F607C94537C2623958D84E6EFCB_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAbstract_99419F607C94537C2623958D84E6EFCB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Abstract] </link:label>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_D8EB630EC525EB3E24C4958D84E690A7_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_D8EB630EC525EB3E24C4958D84E690A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment Disclosure [Text Block] </link:label>
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<link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_BB69CB7468DA5807EEFA958D85CBD84A_label_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract_BB69CB7468DA5807EEFA958D85CBD84A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement of Stockholders' Equity [Abstract] </link:label>
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<link:label id="lab_us-gaap_PaymentsOfStockIssuanceCosts_B44BBF930203E9D15451958D85CB50D2_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfStockIssuanceCosts_B44BBF930203E9D15451958D85CB50D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Offering costs </link:label>
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<link:label id="lab_us-gaap_IncomeTaxesReceivable_CF197216A9EAF8FE922CCF0E6AFE72F4_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesReceivable_CF197216A9EAF8FE922CCF0E6AFE72F4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Taxes Receivable, Current </link:label>
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<link:label id="lab_us-gaap_LessorOperatingLeaseRenewalTerm_64D00A8A62542A1D3A50958D84638418_label_en-US" xlink:label="lab_us-gaap_LessorOperatingLeaseRenewalTerm_64D00A8A62542A1D3A50958D84638418" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lessor, Operating Lease, Renewal Term </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LessorOperatingLeaseRenewalTerm" xlink:label="loc_us-gaap_LessorOperatingLeaseRenewalTerm_64D00A8A62542A1D3A50958D84638418" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LessorOperatingLeaseRenewalTerm_64D00A8A62542A1D3A50958D84638418" xlink:to="lab_us-gaap_LessorOperatingLeaseRenewalTerm_64D00A8A62542A1D3A50958D84638418" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesRentExpenseNet_357A049C45C6C3AB8DB6958D8463F4A5_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesRentExpenseNet_357A049C45C6C3AB8DB6958D8463F4A5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Rental expense </link:label>
<link:label id="lab_us-gaap_OperatingLeasesRentExpenseNet_357A049C45C6C3AB8DB6958D8463F4A5_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesRentExpenseNet_357A049C45C6C3AB8DB6958D8463F4A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Rent Expense, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesRentExpenseNet" xlink:label="loc_us-gaap_OperatingLeasesRentExpenseNet_357A049C45C6C3AB8DB6958D8463F4A5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesRentExpenseNet_357A049C45C6C3AB8DB6958D8463F4A5" xlink:to="lab_us-gaap_OperatingLeasesRentExpenseNet_357A049C45C6C3AB8DB6958D8463F4A5" xlink:type="arc"/>
<link:label id="lab_us-gaap_AmortizationOfLeasedAsset_86F36AC848AFA24EAF47958D846358D3_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfLeasedAsset_86F36AC848AFA24EAF47958D846358D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amortization expenses for assets purchased under capital leases </link:label>
<link:label id="lab_us-gaap_AmortizationOfLeasedAsset_86F36AC848AFA24EAF47958D846358D3_label_en-US" xlink:label="lab_us-gaap_AmortizationOfLeasedAsset_86F36AC848AFA24EAF47958D846358D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Amortization of Leased Asset </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfLeasedAsset" xlink:label="loc_us-gaap_AmortizationOfLeasedAsset_86F36AC848AFA24EAF47958D846358D3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfLeasedAsset_86F36AC848AFA24EAF47958D846358D3" xlink:to="lab_us-gaap_AmortizationOfLeasedAsset_86F36AC848AFA24EAF47958D846358D3" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue_34441C0FC42F51E57A28958D84632EA8_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue_34441C0FC42F51E57A28958D84632EA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Rental income under subleases </link:label>
<link:label id="lab_us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue_34441C0FC42F51E57A28958D84632EA8_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue_34441C0FC42F51E57A28958D84632EA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Income Statement, Sublease Revenue </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue" xlink:label="loc_us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue_34441C0FC42F51E57A28958D84632EA8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DueFromRelatedParties_F76198B37EF2581C7158958D8463E698_verboseLabel_en-US" xlink:label="lab_us-gaap_DueFromRelatedParties_F76198B37EF2581C7158958D8463E698" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Future rental receipts due from related party </link:label>
<link:label id="lab_us-gaap_DueFromRelatedParties_F76198B37EF2581C7158958D8463E698_label_en-US" xlink:label="lab_us-gaap_DueFromRelatedParties_F76198B37EF2581C7158958D8463E698" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Due from Related Parties </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DueFromRelatedParties" xlink:label="loc_us-gaap_DueFromRelatedParties_F76198B37EF2581C7158958D8463E698" xlink:type="locator"/>
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<link:label id="lab_ara_CHANGESINOWNERSHIPINTERESTINCONSOLIDATEDSUBSIDIARIES_5ECE128B84D4F99EC365958D84AA1A82_label_en-US" xlink:label="lab_ara_CHANGESINOWNERSHIPINTERESTINCONSOLIDATEDSUBSIDIARIES_5ECE128B84D4F99EC365958D84AA1A82" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> CHANGES IN OWNERSHIP INTEREST IN CONSOLIDATED SUBSIDIARIES </link:label>
<link:label id="lab_ara_CHANGESINOWNERSHIPINTERESTINCONSOLIDATEDSUBSIDIARIES_5ECE128B84D4F99EC365958D84AA1A82_documentation_en-US" xlink:label="lab_ara_CHANGESINOWNERSHIPINTERESTINCONSOLIDATEDSUBSIDIARIES_5ECE128B84D4F99EC365958D84AA1A82" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> n/a </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_CHANGESINOWNERSHIPINTERESTINCONSOLIDATEDSUBSIDIARIES" xlink:label="loc_ara_CHANGESINOWNERSHIPINTERESTINCONSOLIDATEDSUBSIDIARIES_5ECE128B84D4F99EC365958D84AA1A82" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTextBlock_52EAC45283DC69965E6A958D84AA9DEA_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTextBlock_52EAC45283DC69965E6A958D84AA9DEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of effect of changes in Company's ownership interest on Company's equity </link:label>
<link:label id="lab_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTextBlock_52EAC45283DC69965E6A958D84AA9DEA_label_en-US" xlink:label="lab_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTextBlock_52EAC45283DC69965E6A958D84AA9DEA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTextBlock" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTextBlock_52EAC45283DC69965E6A958D84AA9DEA" xlink:type="locator"/>
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<link:label id="lab_srt_ScenarioPreviouslyReportedMember_5CC274B646B729CFAF80D48F4C367846_verboseLabel_en-US" xlink:label="lab_srt_ScenarioPreviouslyReportedMember_5CC274B646B729CFAF80D48F4C367846" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> As Previously Reported </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioPreviouslyReportedMember" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_5CC274B646B729CFAF80D48F4C367846" xlink:type="locator"/>
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<link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_252094D7056CC419997AD4F683C25BA0_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_252094D7056CC419997AD4F683C25BA0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Patient service operating revenues </link:label>
<link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_252094D7056CC419997AD4F683C25BA0_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_252094D7056CC419997AD4F683C25BA0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revenue from Contract with Customer, Excluding Assessed Tax </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_252094D7056CC419997AD4F683C25BA0" xlink:type="locator"/>
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<link:label id="lab_ara_HealthCareOrganizationPatientServiceRevenue1_02B6ACA842983BB92669D4E718800738_terseLabel_en-US" xlink:label="lab_ara_HealthCareOrganizationPatientServiceRevenue1_02B6ACA842983BB92669D4E718800738" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Patient service operating revenues </link:label>
<link:label id="lab_ara_HealthCareOrganizationPatientServiceRevenue1_02B6ACA842983BB92669D4E718800738_label_en-US" xlink:label="lab_ara_HealthCareOrganizationPatientServiceRevenue1_02B6ACA842983BB92669D4E718800738" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Health Care Organization, Patient Service Revenue1 </link:label>
<link:label id="lab_ara_HealthCareOrganizationPatientServiceRevenue1_02B6ACA842983BB92669D4E718800738_documentation_en-US" xlink:label="lab_ara_HealthCareOrganizationPatientServiceRevenue1_02B6ACA842983BB92669D4E718800738" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Health Care Organization, Patient Service Revenue1 </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_HealthCareOrganizationPatientServiceRevenue1" xlink:label="loc_ara_HealthCareOrganizationPatientServiceRevenue1_02B6ACA842983BB92669D4E718800738" xlink:type="locator"/>
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<link:label id="lab_us-gaap_HealthCareOrganizationPatientServiceRevenueProvisionforBadDebts_D746E42B797A3C32EAEDD4E97589B5A8_negatedLabel_en-US" xlink:label="lab_us-gaap_HealthCareOrganizationPatientServiceRevenueProvisionforBadDebts_D746E42B797A3C32EAEDD4E97589B5A8" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Provision for uncollectible accounts </link:label>
<link:label id="lab_us-gaap_HealthCareOrganizationPatientServiceRevenueProvisionforBadDebts_D746E42B797A3C32EAEDD4E97589B5A8_label_en-US" xlink:label="lab_us-gaap_HealthCareOrganizationPatientServiceRevenueProvisionforBadDebts_D746E42B797A3C32EAEDD4E97589B5A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Health Care Organization, Patient Service Revenue Provision for Bad Debts </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HealthCareOrganizationPatientServiceRevenueProvisionforBadDebts" xlink:label="loc_us-gaap_HealthCareOrganizationPatientServiceRevenueProvisionforBadDebts_D746E42B797A3C32EAEDD4E97589B5A8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_HealthCareOrganizationPatientServiceRevenueLessProvisionForBadDebts_8E08B80C8DB3E4BC9520D4E9ACE58082_totalLabel_en-US" xlink:label="lab_us-gaap_HealthCareOrganizationPatientServiceRevenueLessProvisionForBadDebts_8E08B80C8DB3E4BC9520D4E9ACE58082" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net patient service operating revenues </link:label>
<link:label id="lab_us-gaap_HealthCareOrganizationPatientServiceRevenueLessProvisionForBadDebts_8E08B80C8DB3E4BC9520D4E9ACE58082_label_en-US" xlink:label="lab_us-gaap_HealthCareOrganizationPatientServiceRevenueLessProvisionForBadDebts_8E08B80C8DB3E4BC9520D4E9ACE58082" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Health Care Organization, Patient Service Revenue Less Provision for Bad Debts </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HealthCareOrganizationPatientServiceRevenueLessProvisionForBadDebts" xlink:label="loc_us-gaap_HealthCareOrganizationPatientServiceRevenueLessProvisionForBadDebts_8E08B80C8DB3E4BC9520D4E9ACE58082" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingExpensesAbstract_259B37BBBF9E5F49E596D48F4C371BF0_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingExpensesAbstract_259B37BBBF9E5F49E596D48F4C371BF0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating expenses: </link:label>
<link:label id="lab_us-gaap_OperatingExpensesAbstract_259B37BBBF9E5F49E596D48F4C371BF0_label_en-US" xlink:label="lab_us-gaap_OperatingExpensesAbstract_259B37BBBF9E5F49E596D48F4C371BF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Expenses [Abstract] </link:label>
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<link:label id="lab_us-gaap_HealthCareOrganizationExpensesNet_6DBAD51A04785A36DADCD48F4C380216_verboseLabel_en-US" xlink:label="lab_us-gaap_HealthCareOrganizationExpensesNet_6DBAD51A04785A36DADCD48F4C380216" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Patient care costs </link:label>
<link:label id="lab_us-gaap_HealthCareOrganizationExpensesNet_6DBAD51A04785A36DADCD48F4C380216_label_en-US" xlink:label="lab_us-gaap_HealthCareOrganizationExpensesNet_6DBAD51A04785A36DADCD48F4C380216" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Health Care Organization, Expenses, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HealthCareOrganizationExpensesNet" xlink:label="loc_us-gaap_HealthCareOrganizationExpensesNet_6DBAD51A04785A36DADCD48F4C380216" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_4D66C4E2FAD5E63B97E4D48F4C38A44B_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_4D66C4E2FAD5E63B97E4D48F4C38A44B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> General and administrative </link:label>
<link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_4D66C4E2FAD5E63B97E4D48F4C38A44B_label_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_4D66C4E2FAD5E63B97E4D48F4C38A44B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> General and Administrative Expense </link:label>
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<link:label id="lab_us-gaap_ProfessionalFees_CF6407AFD97D320E4381D48F4C387295_verboseLabel_en-US" xlink:label="lab_us-gaap_ProfessionalFees_CF6407AFD97D320E4381D48F4C387295" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Transaction-related costs </link:label>
<link:label id="lab_us-gaap_ProfessionalFees_CF6407AFD97D320E4381D48F4C387295_label_en-US" xlink:label="lab_us-gaap_ProfessionalFees_CF6407AFD97D320E4381D48F4C387295" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Professional Fees </link:label>
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<link:label id="lab_us-gaap_DepreciationAndAmortization_0A50FE060D6D5C7E9CA8D48F4C381151_label_en-US" xlink:label="lab_us-gaap_DepreciationAndAmortization_0A50FE060D6D5C7E9CA8D48F4C381151" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Depreciation, Depletion and Amortization, Nonproduction </link:label>
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<link:label id="lab_us-gaap_LegalFees_B9E0460015ABD5233F9AD48F4C38DB2D_label_en-US" xlink:label="lab_us-gaap_LegalFees_B9E0460015ABD5233F9AD48F4C38DB2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Legal Fees </link:label>
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<link:label id="lab_us-gaap_CostsAndExpenses_A14399D419D0CDF12B59D48F4C38FBBB_totalLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpenses_A14399D419D0CDF12B59D48F4C38FBBB" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total operating expenses </link:label>
<link:label id="lab_us-gaap_CostsAndExpenses_A14399D419D0CDF12B59D48F4C38FBBB_label_en-US" xlink:label="lab_us-gaap_CostsAndExpenses_A14399D419D0CDF12B59D48F4C38FBBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Costs and Expenses </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_A14399D419D0CDF12B59D48F4C38FBBB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingIncomeLoss_6B94ECD96C595A8D0565D48F4C396234_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss_6B94ECD96C595A8D0565D48F4C396234" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Operating income </link:label>
<link:label id="lab_us-gaap_OperatingIncomeLoss_6B94ECD96C595A8D0565D48F4C396234_label_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss_6B94ECD96C595A8D0565D48F4C396234" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Income (Loss) </link:label>
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<link:label id="lab_us-gaap_InterestIncomeExpenseNonoperatingNet_383D230FBAD208E1E987D48F4C39D1FE_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNonoperatingNet_383D230FBAD208E1E987D48F4C39D1FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest expense, net </link:label>
<link:label id="lab_us-gaap_InterestIncomeExpenseNonoperatingNet_383D230FBAD208E1E987D48F4C39D1FE_label_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNonoperatingNet_383D230FBAD208E1E987D48F4C39D1FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Interest Income (Expense), Nonoperating, Net </link:label>
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<link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_7840FB0ACAEB44A667A0D48F4C391120_verboseLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_7840FB0ACAEB44A667A0D48F4C391120" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Loss on early extinguishment of debt </link:label>
<link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_7840FB0ACAEB44A667A0D48F4C391120_label_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_7840FB0ACAEB44A667A0D48F4C391120" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Gain (Loss) on Extinguishment of Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_7840FB0ACAEB44A667A0D48F4C391120" xlink:type="locator"/>
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<link:label id="lab_ara_IncomeTaxReceivableAgreementIncome_361E77DF4B1092E4E760D48F4C39F33D_terseLabel_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementIncome_361E77DF4B1092E4E760D48F4C39F33D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Change in fair value of income tax receivable agreement </link:label>
<link:label id="lab_ara_IncomeTaxReceivableAgreementIncome_361E77DF4B1092E4E760D48F4C39F33D_label_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementIncome_361E77DF4B1092E4E760D48F4C39F33D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Receivable Agreement Income </link:label>
<link:label id="lab_ara_IncomeTaxReceivableAgreementIncome_361E77DF4B1092E4E760D48F4C39F33D_documentation_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementIncome_361E77DF4B1092E4E760D48F4C39F33D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> The amount of income received through, income tax receivable agreement, during the period. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_IncomeTaxReceivableAgreementIncome" xlink:label="loc_ara_IncomeTaxReceivableAgreementIncome_361E77DF4B1092E4E760D48F4C39F33D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_B9C24EB2B4E7FEEF72D3D48F4C39DC65_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_B9C24EB2B4E7FEEF72D3D48F4C39DC65" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Income before income taxes </link:label>
<link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_B9C24EB2B4E7FEEF72D3D48F4C39DC65_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_B9C24EB2B4E7FEEF72D3D48F4C39DC65" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_B9C24EB2B4E7FEEF72D3D48F4C39DC65" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_465B25F44C8C0206B41ED48F4C391D27_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_465B25F44C8C0206B41ED48F4C391D27" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Income tax (benefit) expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_465B25F44C8C0206B41ED48F4C391D27" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ProfitLoss_50412246FD16FE77FE9CD48F4C3AC101_totalLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss_50412246FD16FE77FE9CD48F4C3AC101" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net income (loss) </link:label>
<link:label id="lab_us-gaap_ProfitLoss_50412246FD16FE77FE9CD48F4C3AC101_label_en-US" xlink:label="lab_us-gaap_ProfitLoss_50412246FD16FE77FE9CD48F4C3AC101" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Income (Loss), Including Portion Attributable to Noncontrolling Interest </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_50412246FD16FE77FE9CD48F4C3AC101" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_122C0F2C70E05E3BDDACD48F4C3A3CFF_negatedLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_122C0F2C70E05E3BDDACD48F4C3A3CFF" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Less: Net income attributable to noncontrolling interests </link:label>
<link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_122C0F2C70E05E3BDDACD48F4C3A3CFF_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_122C0F2C70E05E3BDDACD48F4C3A3CFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Income (Loss) Attributable to Noncontrolling Interest </link:label>
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<link:label id="lab_us-gaap_NetIncomeLoss_F8B168F94EF9547DABDCD48F4C3A7738_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_F8B168F94EF9547DABDCD48F4C3A7738" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net (loss) income attributable to American Renal Associates Holdings, Inc. </link:label>
<link:label id="lab_us-gaap_NetIncomeLoss_F8B168F94EF9547DABDCD48F4C3A7738_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_F8B168F94EF9547DABDCD48F4C3A7738" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Income (Loss) Attributable to Parent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_F8B168F94EF9547DABDCD48F4C3A7738" xlink:type="locator"/>
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<link:label id="lab_us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_227D15B707BDDCF7DD6CD48F4C3AFBDB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_227D15B707BDDCF7DD6CD48F4C3AFBDB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Less: Change in the difference between the redemption value and estimated fair value for accounting purposes of the related noncontrolling interests </link:label>
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<link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_D322F19AAF4B81606830D48F4C3ADDF9_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_D322F19AAF4B81606830D48F4C3ADDF9" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net income (loss) attributable to common shareholders </link:label>
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<link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_B03BFE6007199A7FB848D48F4C3B3666_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_B03BFE6007199A7FB848D48F4C3B3666" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Basic (in shares) </link:label>
<link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_B03BFE6007199A7FB848D48F4C3B3666_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_B03BFE6007199A7FB848D48F4C3B3666" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Weighted Average Number of Shares Outstanding, Basic </link:label>
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<link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_86794D99617F8A11294CD48F4C3BC1E7_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_86794D99617F8A11294CD48F4C3BC1E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Diluted (in shares) </link:label>
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<link:label id="lab_us-gaap_FairValueByAssetClassAxis_E53598E4E8F8ECEB5497B7702F4C2776_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByAssetClassAxis_E53598E4E8F8ECEB5497B7702F4C2776" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Asset Class [Axis] </link:label>
<link:label id="lab_us-gaap_FairValueByAssetClassAxis_E53598E4E8F8ECEB5497B7702F4C2776_label_en-US" xlink:label="lab_us-gaap_FairValueByAssetClassAxis_E53598E4E8F8ECEB5497B7702F4C2776" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Asset Class [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_E53598E4E8F8ECEB5497B7702F4C2776" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_E53598E4E8F8ECEB5497B7702F4C2776" xlink:to="lab_us-gaap_FairValueByAssetClassAxis_E53598E4E8F8ECEB5497B7702F4C2776" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D38AF737D96CE91688FCB770E6154466_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D38AF737D96CE91688FCB770E6154466" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Asset Class [Domain] </link:label>
<link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D38AF737D96CE91688FCB770E6154466_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D38AF737D96CE91688FCB770E6154466" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Asset Class [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D38AF737D96CE91688FCB770E6154466" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D38AF737D96CE91688FCB770E6154466" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_D38AF737D96CE91688FCB770E6154466" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentMember_6775994845461CCF96A6B771C0909ED6_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentMember_6775994845461CCF96A6B771C0909ED6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentMember_6775994845461CCF96A6B771C0909ED6_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentMember_6775994845461CCF96A6B771C0909ED6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentMember" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentMember_6775994845461CCF96A6B771C0909ED6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentMember_6775994845461CCF96A6B771C0909ED6" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentMember_6775994845461CCF96A6B771C0909ED6" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_E546E479B67FBA2E25FAB7083B9C42B6_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_E546E479B67FBA2E25FAB7083B9C42B6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Axis] </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_E546E479B67FBA2E25FAB7083B9C42B6_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_E546E479B67FBA2E25FAB7083B9C42B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_E546E479B67FBA2E25FAB7083B9C42B6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_E546E479B67FBA2E25FAB7083B9C42B6" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_E546E479B67FBA2E25FAB7083B9C42B6" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_9DEB0329A572E00F6273B7083B9C6EFE_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_9DEB0329A572E00F6273B7083B9C6EFE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Domain] </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_9DEB0329A572E00F6273B7083B9C6EFE_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_9DEB0329A572E00F6273B7083B9C6EFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Type [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_9DEB0329A572E00F6273B7083B9C6EFE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_9DEB0329A572E00F6273B7083B9C6EFE" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_9DEB0329A572E00F6273B7083B9C6EFE" xlink:type="arc"/>
<link:label id="lab_us-gaap_LandMember_CF6473D55D5C25F85393B7083B9C45A1_terseLabel_en-US" xlink:label="lab_us-gaap_LandMember_CF6473D55D5C25F85393B7083B9C45A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Land </link:label>
<link:label id="lab_us-gaap_LandMember_CF6473D55D5C25F85393B7083B9C45A1_label_en-US" xlink:label="lab_us-gaap_LandMember_CF6473D55D5C25F85393B7083B9C45A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Land [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LandMember" xlink:label="loc_us-gaap_LandMember_CF6473D55D5C25F85393B7083B9C45A1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LandMember_CF6473D55D5C25F85393B7083B9C45A1" xlink:to="lab_us-gaap_LandMember_CF6473D55D5C25F85393B7083B9C45A1" xlink:type="arc"/>
<link:label id="lab_us-gaap_BuildingAndBuildingImprovementsMember_6EF2CF2AF1916AF18BAEB7083B9C219E_terseLabel_en-US" xlink:label="lab_us-gaap_BuildingAndBuildingImprovementsMember_6EF2CF2AF1916AF18BAEB7083B9C219E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Buildings and improvements </link:label>
<link:label id="lab_us-gaap_BuildingAndBuildingImprovementsMember_6EF2CF2AF1916AF18BAEB7083B9C219E_label_en-US" xlink:label="lab_us-gaap_BuildingAndBuildingImprovementsMember_6EF2CF2AF1916AF18BAEB7083B9C219E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Building and Building Improvements [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_6EF2CF2AF1916AF18BAEB7083B9C219E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BuildingAndBuildingImprovementsMember_6EF2CF2AF1916AF18BAEB7083B9C219E" xlink:to="lab_us-gaap_BuildingAndBuildingImprovementsMember_6EF2CF2AF1916AF18BAEB7083B9C219E" xlink:type="arc"/>
<link:label id="lab_us-gaap_LeaseholdImprovementsMember_C6831DB7A87582C6E0FAB7083B9C17C7_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsMember_C6831DB7A87582C6E0FAB7083B9C17C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Leasehold improvements </link:label>
<link:label id="lab_us-gaap_LeaseholdImprovementsMember_C6831DB7A87582C6E0FAB7083B9C17C7_label_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsMember_C6831DB7A87582C6E0FAB7083B9C17C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Leasehold Improvements [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_C6831DB7A87582C6E0FAB7083B9C17C7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseholdImprovementsMember_C6831DB7A87582C6E0FAB7083B9C17C7" xlink:to="lab_us-gaap_LeaseholdImprovementsMember_C6831DB7A87582C6E0FAB7083B9C17C7" xlink:type="arc"/>
<link:label id="lab_ara_EquipmentAndInformationSystemMember_6135FFDF67B1B44E9455B7083B9DE70C_terseLabel_en-US" xlink:label="lab_ara_EquipmentAndInformationSystemMember_6135FFDF67B1B44E9455B7083B9DE70C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Equipment and information systems </link:label>
<link:label id="lab_ara_EquipmentAndInformationSystemMember_6135FFDF67B1B44E9455B7083B9DE70C_label_en-US" xlink:label="lab_ara_EquipmentAndInformationSystemMember_6135FFDF67B1B44E9455B7083B9DE70C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Equipment And Information System [Member] </link:label>
<link:label id="lab_ara_EquipmentAndInformationSystemMember_6135FFDF67B1B44E9455B7083B9DE70C_documentation_en-US" xlink:label="lab_ara_EquipmentAndInformationSystemMember_6135FFDF67B1B44E9455B7083B9DE70C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Tangible personal property used to produce goods and services and equipment used in the creation, maintenance and utilization of information systems which include computers and peripherals. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_EquipmentAndInformationSystemMember" xlink:label="loc_ara_EquipmentAndInformationSystemMember_6135FFDF67B1B44E9455B7083B9DE70C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_EquipmentAndInformationSystemMember_6135FFDF67B1B44E9455B7083B9DE70C" xlink:to="lab_ara_EquipmentAndInformationSystemMember_6135FFDF67B1B44E9455B7083B9DE70C" xlink:type="arc"/>
<link:label id="lab_us-gaap_ConstructionInProgressMember_F500E52BE6F321A5D3ABB7083B9D0C80_terseLabel_en-US" xlink:label="lab_us-gaap_ConstructionInProgressMember_F500E52BE6F321A5D3ABB7083B9D0C80" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Construction in progress </link:label>
<link:label id="lab_us-gaap_ConstructionInProgressMember_F500E52BE6F321A5D3ABB7083B9D0C80_label_en-US" xlink:label="lab_us-gaap_ConstructionInProgressMember_F500E52BE6F321A5D3ABB7083B9D0C80" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Construction in Progress [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConstructionInProgressMember" xlink:label="loc_us-gaap_ConstructionInProgressMember_F500E52BE6F321A5D3ABB7083B9D0C80" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConstructionInProgressMember_F500E52BE6F321A5D3ABB7083B9D0C80" xlink:to="lab_us-gaap_ConstructionInProgressMember_F500E52BE6F321A5D3ABB7083B9D0C80" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_8FD5F5337C27600DD09DB7083B9D9EED_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_8FD5F5337C27600DD09DB7083B9D9EED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and Equipment </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_8FD5F5337C27600DD09DB7083B9D9EED_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_8FD5F5337C27600DD09DB7083B9D9EED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8FD5F5337C27600DD09DB7083B9D9EED" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8FD5F5337C27600DD09DB7083B9D9EED" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentLineItems_8FD5F5337C27600DD09DB7083B9D9EED" xlink:type="arc"/>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_3FFF8C7CAE923DB9E307B7083B9D5F32_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_3FFF8C7CAE923DB9E307B7083B9D5F32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, gross </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_3FFF8C7CAE923DB9E307B7083B9D5F32_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_3FFF8C7CAE923DB9E307B7083B9D5F32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_3FFF8C7CAE923DB9E307B7083B9D5F32" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_3FFF8C7CAE923DB9E307B7083B9D5F32" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentGross_3FFF8C7CAE923DB9E307B7083B9D5F32" xlink:type="arc"/>
<link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_80D20EB25029539ACB12B7083B9E5BAF_negatedLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_80D20EB25029539ACB12B7083B9E5BAF" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Less accumulated depreciation </link:label>
<link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_80D20EB25029539ACB12B7083B9E5BAF_label_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_80D20EB25029539ACB12B7083B9E5BAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_80D20EB25029539ACB12B7083B9E5BAF" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_C0B4F5DFFC31201980D1B7083B9EB8CE_totalLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_C0B4F5DFFC31201980D1B7083B9EB8CE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment, net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_C0B4F5DFFC31201980D1B7083B9EB8CE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_C0B4F5DFFC31201980D1B7083B9EB8CE" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_C0B4F5DFFC31201980D1B7083B9EB8CE" xlink:type="arc"/>
<link:label id="lab_us-gaap_Depreciation_7689C9385B781D284C59B7083B9EEC28_terseLabel_en-US" xlink:label="lab_us-gaap_Depreciation_7689C9385B781D284C59B7083B9EEC28" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Depreciation of property and equipment </link:label>
<link:label id="lab_us-gaap_Depreciation_7689C9385B781D284C59B7083B9EEC28_label_en-US" xlink:label="lab_us-gaap_Depreciation_7689C9385B781D284C59B7083B9EEC28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Depreciation </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_7689C9385B781D284C59B7083B9EEC28" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Depreciation_7689C9385B781D284C59B7083B9EEC28" xlink:to="lab_us-gaap_Depreciation_7689C9385B781D284C59B7083B9EEC28" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasedAssetsGross_B67C0AEE17628896BECCB7083B9E61A2_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasedAssetsGross_B67C0AEE17628896BECCB7083B9E61A2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cost of assets under capital leases </link:label>
<link:label id="lab_us-gaap_CapitalLeasedAssetsGross_B67C0AEE17628896BECCB7083B9E61A2_label_en-US" xlink:label="lab_us-gaap_CapitalLeasedAssetsGross_B67C0AEE17628896BECCB7083B9E61A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leased Assets, Gross </link:label>
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<link:label id="lab_us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation_97320A2384C5AD518141B7083B9E1462_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation_97320A2384C5AD518141B7083B9E1462" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation </link:label>
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<link:label id="lab_us-gaap_CashAndCashEquivalentsAbstract_4CAAB2814ED5211101B8958D85254118_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAbstract_4CAAB2814ED5211101B8958D85254118" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash and Cash Equivalents [Abstract] </link:label>
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<link:label id="lab_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_8384386D2816F634ABF5958D85250AFF_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_8384386D2816F634ABF5958D85250AFF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash </link:label>
<link:label id="lab_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_8384386D2816F634ABF5958D85250AFF_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_8384386D2816F634ABF5958D85250AFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash and Cash Equivalents Disclosure [Text Block] </link:label>
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<link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrentAbstract_7F5FCA6B0F203C7889B79C31E0FB2061_label_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrentAbstract_7F5FCA6B0F203C7889B79C31E0FB2061" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Employee-related Liabilities, Current [Abstract] </link:label>
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<link:label id="lab_us-gaap_AccruedSalariesCurrent_8F2D573E4CEE6132A03C9C31E0FB708C_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedSalariesCurrent_8F2D573E4CEE6132A03C9C31E0FB708C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued compensation </link:label>
<link:label id="lab_us-gaap_AccruedSalariesCurrent_8F2D573E4CEE6132A03C9C31E0FB708C_label_en-US" xlink:label="lab_us-gaap_AccruedSalariesCurrent_8F2D573E4CEE6132A03C9C31E0FB708C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accrued Salaries, Current </link:label>
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<link:label id="lab_us-gaap_AccruedVacationCurrent_F005BE3BEEFFC481CC489C31E0FBD965_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedVacationCurrent_F005BE3BEEFFC481CC489C31E0FBD965" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued vacation pay </link:label>
<link:label id="lab_us-gaap_AccruedVacationCurrent_F005BE3BEEFFC481CC489C31E0FBD965_label_en-US" xlink:label="lab_us-gaap_AccruedVacationCurrent_F005BE3BEEFFC481CC489C31E0FBD965" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accrued Vacation, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedVacationCurrent" xlink:label="loc_us-gaap_AccruedVacationCurrent_F005BE3BEEFFC481CC489C31E0FBD965" xlink:type="locator"/>
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<link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_A4FEC7A12A5DFD3160279C31E0FB940E_totalLabel_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_A4FEC7A12A5DFD3160279C31E0FB940E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Accrued compensation and benefits </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_A4FEC7A12A5DFD3160279C31E0FB940E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccruedLiabilitiesCurrentAbstract_82D064F15CF5178301099C31E0FCB69E_label_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrentAbstract_82D064F15CF5178301099C31E0FCB69E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accrued Liabilities, Current [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrentAbstract_82D064F15CF5178301099C31E0FCB69E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CustomerRefundLiabilityCurrent_B24841E0792F3BFF0E4B9C31E0FC0CAF_terseLabel_en-US" xlink:label="lab_us-gaap_CustomerRefundLiabilityCurrent_B24841E0792F3BFF0E4B9C31E0FC0CAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Due to payors </link:label>
<link:label id="lab_us-gaap_CustomerRefundLiabilityCurrent_B24841E0792F3BFF0E4B9C31E0FC0CAF_label_en-US" xlink:label="lab_us-gaap_CustomerRefundLiabilityCurrent_B24841E0792F3BFF0E4B9C31E0FC0CAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Customer Refund Liability, Current </link:label>
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<link:label id="lab_us-gaap_AccruedIncomeTaxesCurrent_AC5F20D562BE86D5BA559C558FD3EECA_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxesCurrent_AC5F20D562BE86D5BA559C558FD3EECA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income tax payable </link:label>
<link:label id="lab_us-gaap_AccruedIncomeTaxesCurrent_AC5F20D562BE86D5BA559C558FD3EECA_label_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxesCurrent_AC5F20D562BE86D5BA559C558FD3EECA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accrued Income Taxes, Current </link:label>
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<link:label id="lab_us-gaap_OtherAccruedLiabilitiesCurrent_6F57A6064CB55A43DECB9C31E0FCE4BF_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrent_6F57A6064CB55A43DECB9C31E0FCE4BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other </link:label>
<link:label id="lab_us-gaap_OtherAccruedLiabilitiesCurrent_6F57A6064CB55A43DECB9C31E0FCE4BF_label_en-US" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrent_6F57A6064CB55A43DECB9C31E0FCE4BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Accrued Liabilities, Current </link:label>
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<link:label id="lab_ara_TaxReceivableAgreementLiabilityCurrent_E3AA2224E8711243AD229C31E0FC837C_terseLabel_en-US" xlink:label="lab_ara_TaxReceivableAgreementLiabilityCurrent_E3AA2224E8711243AD229C31E0FC837C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued Settlement </link:label>
<link:label id="lab_ara_TaxReceivableAgreementLiabilityCurrent_E3AA2224E8711243AD229C31E0FC837C_label_en-US" xlink:label="lab_ara_TaxReceivableAgreementLiabilityCurrent_E3AA2224E8711243AD229C31E0FC837C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Tax Receivable Agreement Liability, Current </link:label>
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<link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_69B494B81B9067092792B570DE3B07CD_totalLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_69B494B81B9067092792B570DE3B07CD" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Cash consideration paid </link:label>
<link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_69B494B81B9067092792B570DE3B07CD_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_69B494B81B9067092792B570DE3B07CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_69B494B81B9067092792B570DE3B07CD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_69B494B81B9067092792B570DE3B07CD" xlink:to="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_69B494B81B9067092792B570DE3B07CD" xlink:type="arc"/>
<link:label id="lab_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_5E0361FF5ACF6E7A3551B570DE3B1345_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_5E0361FF5ACF6E7A3551B570DE3B1345" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Goodwill expected to be deductible for tax purposes </link:label>
<link:label id="lab_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_5E0361FF5ACF6E7A3551B570DE3B1345_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_5E0361FF5ACF6E7A3551B570DE3B1345" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Business Acquisition, Goodwill, Expected Tax Deductible Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount" xlink:label="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_5E0361FF5ACF6E7A3551B570DE3B1345" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_5E0361FF5ACF6E7A3551B570DE3B1345" xlink:to="lab_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_5E0361FF5ACF6E7A3551B570DE3B1345" xlink:type="arc"/>
<link:label id="lab_ara_InitialPublicOfferingDisclosureAbstract_4F933BFF156AD6E2FD6D958D8540A3F1_label_en-US" xlink:label="lab_ara_InitialPublicOfferingDisclosureAbstract_4F933BFF156AD6E2FD6D958D8540A3F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> INITIAL PUBLIC OFFERING </link:label>
<link:label id="lab_ara_InitialPublicOfferingDisclosureAbstract_4F933BFF156AD6E2FD6D958D8540A3F1_documentation_en-US" xlink:label="lab_ara_InitialPublicOfferingDisclosureAbstract_4F933BFF156AD6E2FD6D958D8540A3F1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> This concept does not have a custom type definition. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_InitialPublicOfferingDisclosureAbstract" xlink:label="loc_ara_InitialPublicOfferingDisclosureAbstract_4F933BFF156AD6E2FD6D958D8540A3F1" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_InitialPublicOfferingDisclosureAbstract_4F933BFF156AD6E2FD6D958D8540A3F1" xlink:to="lab_ara_InitialPublicOfferingDisclosureAbstract_4F933BFF156AD6E2FD6D958D8540A3F1" xlink:type="arc"/>
<link:label id="lab_ara_InitialPublicOfferingDisclosureTextBlock_0A9C1C79E96058DDC4EB958D85406166_terseLabel_en-US" xlink:label="lab_ara_InitialPublicOfferingDisclosureTextBlock_0A9C1C79E96058DDC4EB958D85406166" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Initial Public Offering </link:label>
<link:label id="lab_ara_InitialPublicOfferingDisclosureTextBlock_0A9C1C79E96058DDC4EB958D85406166_label_en-US" xlink:label="lab_ara_InitialPublicOfferingDisclosureTextBlock_0A9C1C79E96058DDC4EB958D85406166" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Initial Public Offering Disclosure [Text Block] </link:label>
<link:label id="lab_ara_InitialPublicOfferingDisclosureTextBlock_0A9C1C79E96058DDC4EB958D85406166_documentation_en-US" xlink:label="lab_ara_InitialPublicOfferingDisclosureTextBlock_0A9C1C79E96058DDC4EB958D85406166" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> The entire disclosure of initial public offering. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_InitialPublicOfferingDisclosureTextBlock" xlink:label="loc_ara_InitialPublicOfferingDisclosureTextBlock_0A9C1C79E96058DDC4EB958D85406166" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_InitialPublicOfferingDisclosureTextBlock_0A9C1C79E96058DDC4EB958D85406166" xlink:to="lab_ara_InitialPublicOfferingDisclosureTextBlock_0A9C1C79E96058DDC4EB958D85406166" xlink:type="arc"/>
<link:label id="lab_us-gaap_VestingAxis_F7ED0ADC0F70ABBD528E958D83E69A45_terseLabel_en-US" xlink:label="lab_us-gaap_VestingAxis_F7ED0ADC0F70ABBD528E958D83E69A45" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Vesting [Axis] </link:label>
<link:label id="lab_us-gaap_VestingAxis_F7ED0ADC0F70ABBD528E958D83E69A45_label_en-US" xlink:label="lab_us-gaap_VestingAxis_F7ED0ADC0F70ABBD528E958D83E69A45" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Vesting [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingAxis" xlink:label="loc_us-gaap_VestingAxis_F7ED0ADC0F70ABBD528E958D83E69A45" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VestingAxis_F7ED0ADC0F70ABBD528E958D83E69A45" xlink:to="lab_us-gaap_VestingAxis_F7ED0ADC0F70ABBD528E958D83E69A45" xlink:type="arc"/>
<link:label id="lab_us-gaap_VestingDomain_94253197AB6396282FA7958D83E62C19_terseLabel_en-US" xlink:label="lab_us-gaap_VestingDomain_94253197AB6396282FA7958D83E62C19" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Vesting [Domain] </link:label>
<link:label id="lab_us-gaap_VestingDomain_94253197AB6396282FA7958D83E62C19_label_en-US" xlink:label="lab_us-gaap_VestingDomain_94253197AB6396282FA7958D83E62C19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Vesting [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingDomain" xlink:label="loc_us-gaap_VestingDomain_94253197AB6396282FA7958D83E62C19" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VestingDomain_94253197AB6396282FA7958D83E62C19" xlink:to="lab_us-gaap_VestingDomain_94253197AB6396282FA7958D83E62C19" xlink:type="arc"/>
<link:label id="lab_ara_MarketAndPerformanceBasedVestingMember_EA7DF9E94AD3CE098BDE958D83E654A9_terseLabel_en-US" xlink:label="lab_ara_MarketAndPerformanceBasedVestingMember_EA7DF9E94AD3CE098BDE958D83E654A9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Market and Performance Based Vesting </link:label>
<link:label id="lab_ara_MarketAndPerformanceBasedVestingMember_EA7DF9E94AD3CE098BDE958D83E654A9_label_en-US" xlink:label="lab_ara_MarketAndPerformanceBasedVestingMember_EA7DF9E94AD3CE098BDE958D83E654A9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Market And Performance Based Vesting [Member] </link:label>
<link:label id="lab_ara_MarketAndPerformanceBasedVestingMember_EA7DF9E94AD3CE098BDE958D83E654A9_documentation_en-US" xlink:label="lab_ara_MarketAndPerformanceBasedVestingMember_EA7DF9E94AD3CE098BDE958D83E654A9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents information pertaining to market and performance based vesting. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_MarketAndPerformanceBasedVestingMember" xlink:label="loc_ara_MarketAndPerformanceBasedVestingMember_EA7DF9E94AD3CE098BDE958D83E654A9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_MarketAndPerformanceBasedVestingMember_EA7DF9E94AD3CE098BDE958D83E654A9" xlink:to="lab_ara_MarketAndPerformanceBasedVestingMember_EA7DF9E94AD3CE098BDE958D83E654A9" xlink:type="arc"/>
<link:label id="lab_ara_PerformanceAndTimeBasedVestingMember_434D7040B98C07FFC75D958D83E65D55_terseLabel_en-US" xlink:label="lab_ara_PerformanceAndTimeBasedVestingMember_434D7040B98C07FFC75D958D83E65D55" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Performance and Time Based Vesting </link:label>
<link:label id="lab_ara_PerformanceAndTimeBasedVestingMember_434D7040B98C07FFC75D958D83E65D55_label_en-US" xlink:label="lab_ara_PerformanceAndTimeBasedVestingMember_434D7040B98C07FFC75D958D83E65D55" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Performance And Time Based Vesting [Member] </link:label>
<link:label id="lab_ara_PerformanceAndTimeBasedVestingMember_434D7040B98C07FFC75D958D83E65D55_documentation_en-US" xlink:label="lab_ara_PerformanceAndTimeBasedVestingMember_434D7040B98C07FFC75D958D83E65D55" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents information pertaining to performance and time based vesting. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_PerformanceAndTimeBasedVestingMember" xlink:label="loc_ara_PerformanceAndTimeBasedVestingMember_434D7040B98C07FFC75D958D83E65D55" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_PerformanceAndTimeBasedVestingMember_434D7040B98C07FFC75D958D83E65D55" xlink:to="lab_ara_PerformanceAndTimeBasedVestingMember_434D7040B98C07FFC75D958D83E65D55" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_C9AB0CEFD91325A00549958D83E607B5_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_C9AB0CEFD91325A00549958D83E607B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of Options </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_C9AB0CEFD91325A00549958D83E607B5_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_C9AB0CEFD91325A00549958D83E607B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_C9AB0CEFD91325A00549958D83E607B5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_C9AB0CEFD91325A00549958D83E607B5" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_C9AB0CEFD91325A00549958D83E607B5" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_F60648EA38D951B128DB958D83E60A33_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_F60648EA38D951B128DB958D83E60A33" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Outstanding, beginning of period (in shares) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_F60648EA38D951B128DB958D83E60A33_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_F60648EA38D951B128DB958D83E60A33" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_F60648EA38D951B128DB958D83E60A33" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_F60648EA38D951B128DB958D83E60A33" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_F60648EA38D951B128DB958D83E60A33" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_D1BE2614B0B1CE325A43958D83E6F7A8_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_D1BE2614B0B1CE325A43958D83E6F7A8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Granted (in shares) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_D1BE2614B0B1CE325A43958D83E6F7A8_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_D1BE2614B0B1CE325A43958D83E6F7A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_D1BE2614B0B1CE325A43958D83E6F7A8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_D1BE2614B0B1CE325A43958D83E6F7A8" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_D1BE2614B0B1CE325A43958D83E6F7A8" xlink:type="arc"/>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_0518EB506C956EC025B0958D83E67A05_negatedLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_0518EB506C956EC025B0958D83E67A05" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Exercised (in shares) </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_0518EB506C956EC025B0958D83E67A05_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_0518EB506C956EC025B0958D83E67A05" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_0518EB506C956EC025B0958D83E67A05" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_0518EB506C956EC025B0958D83E67A05" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_0518EB506C956EC025B0958D83E67A05" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_85A4B868B2E3D88E14C4958D83E6AF05_negatedLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_85A4B868B2E3D88E14C4958D83E6AF05" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Forfeited/Cancelled (in shares) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_85A4B868B2E3D88E14C4958D83E6AF05_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_85A4B868B2E3D88E14C4958D83E6AF05" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_85A4B868B2E3D88E14C4958D83E6AF05" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_85A4B868B2E3D88E14C4958D83E6AF05" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_85A4B868B2E3D88E14C4958D83E6AF05" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_02D7C8A0C83C97498388958D83E658DB_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_02D7C8A0C83C97498388958D83E658DB" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Outstanding, end of period (in shares) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_02D7C8A0C83C97498388958D83E658DB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_7EDCA2C239B380F237F7958D83E67AAE_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_7EDCA2C239B380F237F7958D83E67AAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Options vested and expected to vest, end of period (in shares) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_7EDCA2C239B380F237F7958D83E67AAE_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_7EDCA2C239B380F237F7958D83E67AAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_7EDCA2C239B380F237F7958D83E67AAE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_7EDCA2C239B380F237F7958D83E67AAE" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_7EDCA2C239B380F237F7958D83E67AAE" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_02C81BFCE7E05AC72648958D83E62C80_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_02C81BFCE7E05AC72648958D83E62C80" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Options exercisable, end of period (in shares) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_02C81BFCE7E05AC72648958D83E62C80_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_02C81BFCE7E05AC72648958D83E62C80" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_02C81BFCE7E05AC72648958D83E62C80" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_02C81BFCE7E05AC72648958D83E62C80" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_02C81BFCE7E05AC72648958D83E62C80" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_63AAA620814235094395958D83E69E30_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_63AAA620814235094395958D83E69E30" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted-average exercise price </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_63AAA620814235094395958D83E69E30_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_63AAA620814235094395958D83E69E30" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_63AAA620814235094395958D83E69E30" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_63AAA620814235094395958D83E69E30" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_63AAA620814235094395958D83E69E30" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_3140135E41EFA74FA92D958D83E600D6_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_3140135E41EFA74FA92D958D83E600D6" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Options outstanding, weighted average exercise price, beginning of period (in USD per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_3140135E41EFA74FA92D958D83E600D6_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_3140135E41EFA74FA92D958D83E600D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_3140135E41EFA74FA92D958D83E600D6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_3140135E41EFA74FA92D958D83E600D6" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_3140135E41EFA74FA92D958D83E600D6" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_0F1DA74C4E557D1D07D9958D83E6C156_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_0F1DA74C4E557D1D07D9958D83E6C156" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Granted, weighted average exercise price (in USD per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_0F1DA74C4E557D1D07D9958D83E6C156_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_0F1DA74C4E557D1D07D9958D83E6C156" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_0F1DA74C4E557D1D07D9958D83E6C156" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_0F1DA74C4E557D1D07D9958D83E6C156" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_0F1DA74C4E557D1D07D9958D83E6C156" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_5AB7E6E8318581F1A230958D83E6E42C_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_5AB7E6E8318581F1A230958D83E6E42C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Exercised, weighted average exercise price (in USD per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_5AB7E6E8318581F1A230958D83E6E42C_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_5AB7E6E8318581F1A230958D83E6E42C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_5AB7E6E8318581F1A230958D83E6E42C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_5AB7E6E8318581F1A230958D83E6E42C" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_5AB7E6E8318581F1A230958D83E6E42C" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_6562CE947EFFDE92F495958D83E6207F_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_6562CE947EFFDE92F495958D83E6207F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Forfeited/Cancelled, weighted average exercise price (in USD per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_6562CE947EFFDE92F495958D83E6207F_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_6562CE947EFFDE92F495958D83E6207F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_6562CE947EFFDE92F495958D83E6207F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_6562CE947EFFDE92F495958D83E6207F" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_6562CE947EFFDE92F495958D83E6207F" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_DFE4F21DA85B783CB0D4958D83E6F3E9_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_DFE4F21DA85B783CB0D4958D83E6F3E9" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Options outstanding, weighted average exercise price, end of period (in USD per share) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_DFE4F21DA85B783CB0D4958D83E6F3E9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_DFE4F21DA85B783CB0D4958D83E6F3E9" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_DFE4F21DA85B783CB0D4958D83E6F3E9" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_BEA359D168760704D90A958D83E67CE5_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_BEA359D168760704D90A958D83E67CE5" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Options vested and expected to vest, weighted average exercise price, end of period (in USD per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_BEA359D168760704D90A958D83E67CE5_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_BEA359D168760704D90A958D83E67CE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_BEA359D168760704D90A958D83E67CE5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_BEA359D168760704D90A958D83E67CE5" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_BEA359D168760704D90A958D83E67CE5" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_8D847FD2CDA691FAF3BA958D83E64902_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_8D847FD2CDA691FAF3BA958D83E64902" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Options exercisable, weighted average exercise price, end of period (in USD per share) </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_8D847FD2CDA691FAF3BA958D83E64902_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_8D847FD2CDA691FAF3BA958D83E64902" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_8D847FD2CDA691FAF3BA958D83E64902" xlink:type="locator"/>
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<link:label id="lab_ara_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract_DEDF670A78D2FC7A1A64958D83E645B7_terseLabel_en-US" xlink:label="lab_ara_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract_DEDF670A78D2FC7A1A64958D83E645B7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted - average remaining contractual term (in years) </link:label>
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<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_7455F5F5D8D879858038958D83E6840E_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_7455F5F5D8D879858038958D83E6840E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Options outstanding, weighted average remaining contractual term </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_7455F5F5D8D879858038958D83E6840E_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_7455F5F5D8D879858038958D83E6840E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term </link:label>
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<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_E46659EFA8B70E014443958D83E6B116_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_E46659EFA8B70E014443958D83E6B116" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Vested and expected to vest, weighted average remaining contractual term </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_E46659EFA8B70E014443958D83E6B116_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_E46659EFA8B70E014443958D83E6B116" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term </link:label>
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<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EFE7F1181CF3A2D57C52958D83E6A34B_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EFE7F1181CF3A2D57C52958D83E6A34B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Exercisable, weighted average remaining contractual term </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EFE7F1181CF3A2D57C52958D83E6A34B_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EFE7F1181CF3A2D57C52958D83E6A34B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term </link:label>
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<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EFE7F1181CF3A2D57C52958D83E6A34B" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EFE7F1181CF3A2D57C52958D83E6A34B" xlink:type="arc"/>
<link:label id="lab_ara_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_EC00952A52590C9B25BE958D83E69630_terseLabel_en-US" xlink:label="lab_ara_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_EC00952A52590C9B25BE958D83E69630" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Aggregate intrinsic value </link:label>
<link:label id="lab_ara_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_EC00952A52590C9B25BE958D83E69630_label_en-US" xlink:label="lab_ara_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_EC00952A52590C9B25BE958D83E69630" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share Based Compensation Arrangement by Share Based Payment Award Options Outstanding Intrinsic Value [Abstract] </link:label>
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<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_EC00952A52590C9B25BE958D83E69630" xlink:to="lab_ara_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_EC00952A52590C9B25BE958D83E69630" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_43E8A01FF68A60A91CFF958D83E61D49_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_43E8A01FF68A60A91CFF958D83E61D49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Options outstanding, Aggregate intrinsic value </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_43E8A01FF68A60A91CFF958D83E61D49_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_43E8A01FF68A60A91CFF958D83E61D49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_43E8A01FF68A60A91CFF958D83E61D49" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_43E8A01FF68A60A91CFF958D83E61D49" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_43E8A01FF68A60A91CFF958D83E61D49" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_38D3185B32C78463CE3F958D83E6577E_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_38D3185B32C78463CE3F958D83E6577E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Vested and expected to vest, Aggregate intrinsic value </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_38D3185B32C78463CE3F958D83E6577E_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_38D3185B32C78463CE3F958D83E6577E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_38D3185B32C78463CE3F958D83E6577E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_38D3185B32C78463CE3F958D83E6577E" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_38D3185B32C78463CE3F958D83E6577E" xlink:type="arc"/>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_8935B50242A43DF81212958D83E6F5DB_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_8935B50242A43DF81212958D83E6F5DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Exercisable, Aggregate intrinsic value </link:label>
<link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_8935B50242A43DF81212958D83E6F5DB_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_8935B50242A43DF81212958D83E6F5DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_8935B50242A43DF81212958D83E6F5DB" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_8935B50242A43DF81212958D83E6F5DB" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_8935B50242A43DF81212958D83E6F5DB" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_54C9A6193A34AE021C89958D83E60BC6_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_54C9A6193A34AE021C89958D83E60BC6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Aggregate intrinsic value of stock options exercised </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_54C9A6193A34AE021C89958D83E60BC6_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_54C9A6193A34AE021C89958D83E60BC6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_54C9A6193A34AE021C89958D83E60BC6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_54C9A6193A34AE021C89958D83E60BC6" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_54C9A6193A34AE021C89958D83E60BC6" xlink:type="arc"/>
<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_88CBF723CB1C71D76871958D83E639B9_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_88CBF723CB1C71D76871958D83E639B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Unrecognized compensation costs </link:label>
<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_88CBF723CB1C71D76871958D83E639B9_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_88CBF723CB1C71D76871958D83E639B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_88CBF723CB1C71D76871958D83E639B9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_88CBF723CB1C71D76871958D83E639B9" xlink:to="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_88CBF723CB1C71D76871958D83E639B9" xlink:type="arc"/>
<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_B66DB06268727B3A961F958D83E6FEB3_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_B66DB06268727B3A961F958D83E6FEB3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average period </link:label>
<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_B66DB06268727B3A961F958D83E6FEB3_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_B66DB06268727B3A961F958D83E6FEB3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_B66DB06268727B3A961F958D83E6FEB3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_B66DB06268727B3A961F958D83E6FEB3" xlink:to="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_B66DB06268727B3A961F958D83E6FEB3" xlink:type="arc"/>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_74319F440A85B9323D00958D84C6851D_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_74319F440A85B9323D00958D84C6851D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Estimated annual amortization expense related to amortizable intangible </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_74319F440A85B9323D00958D84C6851D_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_74319F440A85B9323D00958D84C6851D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_74319F440A85B9323D00958D84C6851D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_74319F440A85B9323D00958D84C6851D" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_74319F440A85B9323D00958D84C6851D" xlink:type="arc"/>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9C8FA8ED50DD56692540958D84C6D844_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9C8FA8ED50DD56692540958D84C6D844" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2019 </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9C8FA8ED50DD56692540958D84C6D844_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9C8FA8ED50DD56692540958D84C6D844" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9C8FA8ED50DD56692540958D84C6D844" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_FBFD6FAB4A232A1C4AE5958D84C6DEE8_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_FBFD6FAB4A232A1C4AE5958D84C6DEE8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_FBFD6FAB4A232A1C4AE5958D84C6DEE8_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_FBFD6FAB4A232A1C4AE5958D84C6DEE8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Year Two </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_FBFD6FAB4A232A1C4AE5958D84C6DEE8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_E49ECD21409890A75A32958D84C63E1F_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_E49ECD21409890A75A32958D84C63E1F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_E49ECD21409890A75A32958D84C63E1F_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_E49ECD21409890A75A32958D84C63E1F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Year Three </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_E49ECD21409890A75A32958D84C63E1F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4CFBBAFC8D10E0015AF0958D84C60B78_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4CFBBAFC8D10E0015AF0958D84C60B78" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4CFBBAFC8D10E0015AF0958D84C60B78_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4CFBBAFC8D10E0015AF0958D84C60B78" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Year Four </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4CFBBAFC8D10E0015AF0958D84C60B78" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_FB43301A3F317112C2F4958D84C6DFF5_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_FB43301A3F317112C2F4958D84C6DFF5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> 2023 </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_FB43301A3F317112C2F4958D84C6DFF5_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_FB43301A3F317112C2F4958D84C6DFF5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, Year Five </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_FB43301A3F317112C2F4958D84C6DFF5" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_D3EC6B019AFA105D9CD8958D84C6D82D_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_D3EC6B019AFA105D9CD8958D84C6D82D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Thereafter </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_D3EC6B019AFA105D9CD8958D84C6D82D_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_D3EC6B019AFA105D9CD8958D84C6D82D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Amortization Expense, after Year Five </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_D3EC6B019AFA105D9CD8958D84C6D82D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_C5D9C73D9B832EB02AE8958D84C6CAD3_totalLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_C5D9C73D9B832EB02AE8958D84C6CAD3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net intangible assets subject to amortization </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_C5D9C73D9B832EB02AE8958D84C6CAD3_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_C5D9C73D9B832EB02AE8958D84C6CAD3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Net </link:label>
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<link:label id="lab_us-gaap_LegalMattersAndContingenciesTextBlock_AC54BDB2AAC19109C8DD958D83C7666B_terseLabel_en-US" xlink:label="lab_us-gaap_LegalMattersAndContingenciesTextBlock_AC54BDB2AAC19109C8DD958D83C7666B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Certain Legal Matters and Other Matters </link:label>
<link:label id="lab_us-gaap_LegalMattersAndContingenciesTextBlock_AC54BDB2AAC19109C8DD958D83C7666B_label_en-US" xlink:label="lab_us-gaap_LegalMattersAndContingenciesTextBlock_AC54BDB2AAC19109C8DD958D83C7666B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Legal Matters and Contingencies [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LegalMattersAndContingenciesTextBlock" xlink:label="loc_us-gaap_LegalMattersAndContingenciesTextBlock_AC54BDB2AAC19109C8DD958D83C7666B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_98E128352414F1CB123FFCD779CB97C6_label_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract_98E128352414F1CB123FFCD779CB97C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement of Cash Flows [Abstract] </link:label>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1E9802B4AA1D6ED334A4FCD779CBC686_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1E9802B4AA1D6ED334A4FCD779CBC686" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1E9802B4AA1D6ED334A4FCD779CBC686_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_1E9802B4AA1D6ED334A4FCD779CBC686" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Operating Activities [Abstract] </link:label>
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<link:label id="lab_us-gaap_ProfitLoss_7637FA5149B6650AB6B3FCD779CFAE23_terseLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss_7637FA5149B6650AB6B3FCD779CFAE23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Net income </link:label>
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<link:label id="lab_us-gaap_AmortizationOfFinancingCostsAndDiscounts_541D13A0F53BC5B2EF58FCD779CFC277_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCostsAndDiscounts_541D13A0F53BC5B2EF58FCD779CFC277" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amortization of discounts, fees and deferred financing costs </link:label>
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<link:label id="lab_us-gaap_ShareBasedCompensation_7EE54BC1805E1B10FA94FCD779CFB36A_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_7EE54BC1805E1B10FA94FCD779CFB36A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Stock-based compensation </link:label>
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<link:label id="lab_ara_PaymentsforPremiumonInterestRateCapAgreements_7FB3E51F0CA6C2DDC59EFCD779CFB074_negatedTerseLabel_en-US" xlink:label="lab_ara_PaymentsforPremiumonInterestRateCapAgreements_7FB3E51F0CA6C2DDC59EFCD779CFB074" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Premium paid for interest rate cap agreements </link:label>
<link:label id="lab_ara_PaymentsforPremiumonInterestRateCapAgreements_7FB3E51F0CA6C2DDC59EFCD779CFB074_label_en-US" xlink:label="lab_ara_PaymentsforPremiumonInterestRateCapAgreements_7FB3E51F0CA6C2DDC59EFCD779CFB074" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments for Premium on Interest Rate Cap Agreements </link:label>
<link:label id="lab_ara_PaymentsforPremiumonInterestRateCapAgreements_7FB3E51F0CA6C2DDC59EFCD779CFB074_documentation_en-US" xlink:label="lab_ara_PaymentsforPremiumonInterestRateCapAgreements_7FB3E51F0CA6C2DDC59EFCD779CFB074" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Payments for Premium on Interest Rate Cap Agreements </link:label>
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<link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_D291BFF47EBADD1D0891FCD779CFD11B_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_D291BFF47EBADD1D0891FCD779CFD11B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Income Tax Expense (Benefit) </link:label>
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<link:label id="lab_ara_IncomeTaxReceivableAgreementIncome_9FDFD3B32F731E76FA2CFCD779CF7275_negatedLabel_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementIncome_9FDFD3B32F731E76FA2CFCD779CF7275" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Change in fair value of income tax receivable agreement </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_IncomeTaxReceivableAgreementIncome" xlink:label="loc_ara_IncomeTaxReceivableAgreementIncome_9FDFD3B32F731E76FA2CFCD779CF7275" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities_AF8FA0466A493D599D91FCD779CF1FE9_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities_AF8FA0466A493D599D91FCD779CF1FE9" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Non-cash charge related to derivative agreements </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities_AF8FA0466A493D599D91FCD779CF1FE9_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities_AF8FA0466A493D599D91FCD779CF1FE9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Derivative Assets and Liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities_AF8FA0466A493D599D91FCD779CF1FE9" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherNoncashExpense_BA1EE5B9718651F0FAB9FCD779CF8420_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNoncashExpense_BA1EE5B9718651F0FAB9FCD779CF8420" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Non-cash rent charges </link:label>
<link:label id="lab_us-gaap_OtherNoncashExpense_BA1EE5B9718651F0FAB9FCD779CF8420_label_en-US" xlink:label="lab_us-gaap_OtherNoncashExpense_BA1EE5B9718651F0FAB9FCD779CF8420" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Noncash Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncashExpense" xlink:label="loc_us-gaap_OtherNoncashExpense_BA1EE5B9718651F0FAB9FCD779CF8420" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GainLossOnDispositionOfAssets1_11AE036380CA873EA1D5FCD779CFCA04_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets1_11AE036380CA873EA1D5FCD779CFCA04" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Loss (gain) on disposal of assets </link:label>
<link:label id="lab_us-gaap_GainLossOnDispositionOfAssets1_11AE036380CA873EA1D5FCD779CFCA04_label_en-US" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets1_11AE036380CA873EA1D5FCD779CFCA04" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Gain (Loss) on Disposition of Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_11AE036380CA873EA1D5FCD779CFCA04" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3A26FFEE4FDE4935A704FCD779CF2272_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3A26FFEE4FDE4935A704FCD779CF2272" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Change in operating assets and liabilities, net of acquisitions: </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3A26FFEE4FDE4935A704FCD779CF2272_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3A26FFEE4FDE4935A704FCD779CF2272" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Operating Capital [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3A26FFEE4FDE4935A704FCD779CF2272" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2CA8165890096F8EF013FCD779CFAFC1_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2CA8165890096F8EF013FCD779CFAFC1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Accounts Receivable </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_2CA8165890096F8EF013FCD779CFAFC1" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInInventories_9FF488C741C31B425067FCD779CF9F66_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInventories_9FF488C741C31B425067FCD779CF9F66" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Inventories </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_9FF488C741C31B425067FCD779CF9F66" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_1FE6E90DF758F6C51E09FCD779CF0376_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_1FE6E90DF758F6C51E09FCD779CF0376" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Prepaid expenses and other current assets </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_1FE6E90DF758F6C51E09FCD779CF0376" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_F379E16B1D58ED288764FCD779CFD4D3_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_F379E16B1D58ED288764FCD779CFD4D3" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Other assets </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_F379E16B1D58ED288764FCD779CFD4D3_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_F379E16B1D58ED288764FCD779CFD4D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Other Operating Assets </link:label>
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<link:label id="lab_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_9A88225C16D1419ED640FCD779CF80B3_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_9A88225C16D1419ED640FCD779CF80B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued compensation and benefits </link:label>
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<link:label id="lab_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_780846CE1F6CB3F29B80FCD779CF8A6B_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_780846CE1F6CB3F29B80FCD779CF8A6B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued expenses and other liabilities </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_780846CE1F6CB3F29B80FCD779CF8A6B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC1A3CECF49895D83A1AFCD779CF3039_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC1A3CECF49895D83A1AFCD779CF3039" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Cash provided by operating activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC1A3CECF49895D83A1AFCD779CF3039_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC1A3CECF49895D83A1AFCD779CF3039" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Operating Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC1A3CECF49895D83A1AFCD779CF3039" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC1A3CECF49895D83A1AFCD779CF3039" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_FC1A3CECF49895D83A1AFCD779CF3039" xlink:type="arc"/>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F842434CCB65EEBCEA2AFCD779CF37E0_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F842434CCB65EEBCEA2AFCD779CF37E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Investing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F842434CCB65EEBCEA2AFCD779CF37E0_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F842434CCB65EEBCEA2AFCD779CF37E0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Investing Activities [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F842434CCB65EEBCEA2AFCD779CF37E0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F842434CCB65EEBCEA2AFCD779CF37E0" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_F842434CCB65EEBCEA2AFCD779CF37E0" xlink:type="arc"/>
<link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A3E6EAEB690D6FB8EFFEFCD779D36C29_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A3E6EAEB690D6FB8EFFEFCD779D36C29" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Purchases of property, equipment and intangible assets </link:label>
<link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A3E6EAEB690D6FB8EFFEFCD779D36C29_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A3E6EAEB690D6FB8EFFEFCD779D36C29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments to Acquire Property, Plant, and Equipment </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A3E6EAEB690D6FB8EFFEFCD779D36C29" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A3E6EAEB690D6FB8EFFEFCD779D36C29" xlink:to="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A3E6EAEB690D6FB8EFFEFCD779D36C29" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_D66A27C3B82610844F2AFCD779D3212D_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_D66A27C3B82610844F2AFCD779D3212D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds from asset sales </link:label>
<link:label id="lab_us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_D66A27C3B82610844F2AFCD779D3212D_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_D66A27C3B82610844F2AFCD779D3212D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Sales of Business, Affiliate and Productive Assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets" xlink:label="loc_us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_D66A27C3B82610844F2AFCD779D3212D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_D66A27C3B82610844F2AFCD779D3212D" xlink:to="lab_us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_D66A27C3B82610844F2AFCD779D3212D" xlink:type="arc"/>
<link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_4CCF23384B2522A007F5FCD779D391C8_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_4CCF23384B2522A007F5FCD779D391C8" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Cash paid for acquisitions </link:label>
<link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_4CCF23384B2522A007F5FCD779D391C8_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_4CCF23384B2522A007F5FCD779D391C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments to Acquire Businesses, Net of Cash Acquired </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_4CCF23384B2522A007F5FCD779D391C8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_4CCF23384B2522A007F5FCD779D391C8" xlink:to="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_4CCF23384B2522A007F5FCD779D391C8" xlink:type="arc"/>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_C2825005F672AF2E3DCEFCD779D3863E_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_C2825005F672AF2E3DCEFCD779D3863E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Cash used in investing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_C2825005F672AF2E3DCEFCD779D3863E_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_C2825005F672AF2E3DCEFCD779D3863E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Investing Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_C2825005F672AF2E3DCEFCD779D3863E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_C2825005F672AF2E3DCEFCD779D3863E" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_C2825005F672AF2E3DCEFCD779D3863E" xlink:type="arc"/>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_CC99BE2AB4FA446D4C2DFCD779D3A398_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_CC99BE2AB4FA446D4C2DFCD779D3A398" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Financing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_CC99BE2AB4FA446D4C2DFCD779D3A398_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_CC99BE2AB4FA446D4C2DFCD779D3A398" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Financing Activities [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_CC99BE2AB4FA446D4C2DFCD779D3A398" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_CC99BE2AB4FA446D4C2DFCD779D3A398" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_CC99BE2AB4FA446D4C2DFCD779D3A398" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProceedsFromIssuanceInitialPublicOffering_F17D739FFE29BA27CBECFCD779D3FAB9_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceInitialPublicOffering_F17D739FFE29BA27CBECFCD779D3FAB9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds from issuance of common stock sold in initial public offering, net of underwriting discounts and offering expense </link:label>
<link:label id="lab_us-gaap_ProceedsFromIssuanceInitialPublicOffering_F17D739FFE29BA27CBECFCD779D3FAB9_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceInitialPublicOffering_F17D739FFE29BA27CBECFCD779D3FAB9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Issuance Initial Public Offering </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:label="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_F17D739FFE29BA27CBECFCD779D3FAB9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_F17D739FFE29BA27CBECFCD779D3FAB9" xlink:to="lab_us-gaap_ProceedsFromIssuanceInitialPublicOffering_F17D739FFE29BA27CBECFCD779D3FAB9" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_16EC1C35BE71EAA55663FCD779D35750_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_16EC1C35BE71EAA55663FCD779D35750" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Net proceeds from issuance of long-term debt </link:label>
<link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_16EC1C35BE71EAA55663FCD779D35750_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_16EC1C35BE71EAA55663FCD779D35750" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Issuance of Long-term Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_16EC1C35BE71EAA55663FCD779D35750" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_16EC1C35BE71EAA55663FCD779D35750" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_16EC1C35BE71EAA55663FCD779D35750" xlink:type="arc"/>
<link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9A475A445B3A45079CC2FCD779D34674_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9A475A445B3A45079CC2FCD779D34674" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Cash paid for financing costs </link:label>
<link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9A475A445B3A45079CC2FCD779D34674_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9A475A445B3A45079CC2FCD779D34674" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments of Debt Issuance Costs </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_9A475A445B3A45079CC2FCD779D34674" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDebtIssuanceCosts_9A475A445B3A45079CC2FCD779D34674" xlink:to="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9A475A445B3A45079CC2FCD779D34674" xlink:type="arc"/>
<link:label id="lab_us-gaap_ProceedsFromIssuanceOfDebt_3D67B7B338DA4BF62A62FCD779D370EF_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfDebt_3D67B7B338DA4BF62A62FCD779D370EF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds on term loans, net of deferred financing costs </link:label>
<link:label id="lab_us-gaap_ProceedsFromIssuanceOfDebt_3D67B7B338DA4BF62A62FCD779D370EF_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfDebt_3D67B7B338DA4BF62A62FCD779D370EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Issuance of Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_3D67B7B338DA4BF62A62FCD779D370EF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfDebt_3D67B7B338DA4BF62A62FCD779D370EF" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfDebt_3D67B7B338DA4BF62A62FCD779D370EF" xlink:type="arc"/>
<link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_E8F4FBD34EC8F8663DF1FCD779D35603_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_E8F4FBD34EC8F8663DF1FCD779D35603" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Payments on long-term debt </link:label>
<link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_E8F4FBD34EC8F8663DF1FCD779D35603_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_E8F4FBD34EC8F8663DF1FCD779D35603" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Repayments of Long-term Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_E8F4FBD34EC8F8663DF1FCD779D35603" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PaymentsOfDividends_D08ECD2E344C4E15E2CFFCD779D3D72A_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividends_D08ECD2E344C4E15E2CFFCD779D3D72A" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Dividends and dividend equivalents paid </link:label>
<link:label id="lab_us-gaap_PaymentsOfDividends_D08ECD2E344C4E15E2CFFCD779D3D72A_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividends_D08ECD2E344C4E15E2CFFCD779D3D72A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments of Dividends </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaap_PaymentsOfDividends_D08ECD2E344C4E15E2CFFCD779D3D72A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ProceedsFromStockOptionsExercised_DD9C87F69743BB4229B8FCD779D39C00_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised_DD9C87F69743BB4229B8FCD779D39C00" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds from exercise of stock options </link:label>
<link:label id="lab_us-gaap_ProceedsFromStockOptionsExercised_DD9C87F69743BB4229B8FCD779D39C00_label_en-US" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised_DD9C87F69743BB4229B8FCD779D39C00" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Stock Options Exercised </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_DD9C87F69743BB4229B8FCD779D39C00" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_C7D7F99C217714D29328FCD779D38EF8_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_C7D7F99C217714D29328FCD779D38EF8" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Common stock repurchases for tax withholdings of net settlement of equity awards </link:label>
<link:label id="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_C7D7F99C217714D29328FCD779D38EF8_label_en-US" xlink:label="lab_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_C7D7F99C217714D29328FCD779D38EF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payment, Tax Withholding, Share-based Payment Arrangement </link:label>
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<link:label id="lab_ara_PaymentsRelatedToRepurchasesOfVestedRestrictedStockAwardsWithheldOnNetShareSettlement_D25911FB9DF1E90B6497FCD779D38658_negatedLabel_en-US" xlink:label="lab_ara_PaymentsRelatedToRepurchasesOfVestedRestrictedStockAwardsWithheldOnNetShareSettlement_D25911FB9DF1E90B6497FCD779D38658" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Repurchases of vested restricted stock awards withheld on net share settlement </link:label>
<link:label id="lab_ara_PaymentsRelatedToRepurchasesOfVestedRestrictedStockAwardsWithheldOnNetShareSettlement_D25911FB9DF1E90B6497FCD779D38658_label_en-US" xlink:label="lab_ara_PaymentsRelatedToRepurchasesOfVestedRestrictedStockAwardsWithheldOnNetShareSettlement_D25911FB9DF1E90B6497FCD779D38658" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments Related To Repurchases Of Vested Restricted Stock Awards Withheld On Net Share Settlement </link:label>
<link:label id="lab_ara_PaymentsRelatedToRepurchasesOfVestedRestrictedStockAwardsWithheldOnNetShareSettlement_D25911FB9DF1E90B6497FCD779D38658_documentation_en-US" xlink:label="lab_ara_PaymentsRelatedToRepurchasesOfVestedRestrictedStockAwardsWithheldOnNetShareSettlement_D25911FB9DF1E90B6497FCD779D38658" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Payments Related To Repurchases Of Vested Restricted Stock Awards Withheld On Net Share Settlement </link:label>
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<link:label id="lab_us-gaap_PaymentsOfDistributionsToAffiliates_48081D325D077796CFF5FCD779D35B23_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDistributionsToAffiliates_48081D325D077796CFF5FCD779D35B23" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Distributions to noncontrolling interests </link:label>
<link:label id="lab_us-gaap_PaymentsOfDistributionsToAffiliates_48081D325D077796CFF5FCD779D35B23_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDistributionsToAffiliates_48081D325D077796CFF5FCD779D35B23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments of Distributions to Affiliates </link:label>
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<link:label id="lab_us-gaap_ProceedsFromContributionsFromAffiliates_0EA017342FA889FB63F1FCD779D3C89E_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromContributionsFromAffiliates_0EA017342FA889FB63F1FCD779D3C89E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Contributions from noncontrolling interests </link:label>
<link:label id="lab_us-gaap_ProceedsFromContributionsFromAffiliates_0EA017342FA889FB63F1FCD779D3C89E_label_en-US" xlink:label="lab_us-gaap_ProceedsFromContributionsFromAffiliates_0EA017342FA889FB63F1FCD779D3C89E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Contributions from Affiliates </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromContributionsFromAffiliates" xlink:label="loc_us-gaap_ProceedsFromContributionsFromAffiliates_0EA017342FA889FB63F1FCD779D3C89E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PaymentsToMinorityShareholders_6CB9A0E2C14CF398154FFCD779D3A701_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToMinorityShareholders_6CB9A0E2C14CF398154FFCD779D3A701" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Purchases of noncontrolling interests </link:label>
<link:label id="lab_us-gaap_PaymentsToMinorityShareholders_6CB9A0E2C14CF398154FFCD779D3A701_label_en-US" xlink:label="lab_us-gaap_PaymentsToMinorityShareholders_6CB9A0E2C14CF398154FFCD779D3A701" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments to Noncontrolling Interests </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToMinorityShareholders" xlink:label="loc_us-gaap_PaymentsToMinorityShareholders_6CB9A0E2C14CF398154FFCD779D3A701" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ProceedsFromMinorityShareholders_142EAF4B6EDFAFA89ABAFCD779D36278_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromMinorityShareholders_142EAF4B6EDFAFA89ABAFCD779D36278" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds from sales of additional noncontrolling interests </link:label>
<link:label id="lab_us-gaap_ProceedsFromMinorityShareholders_142EAF4B6EDFAFA89ABAFCD779D36278_label_en-US" xlink:label="lab_us-gaap_ProceedsFromMinorityShareholders_142EAF4B6EDFAFA89ABAFCD779D36278" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Noncontrolling Interests </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromMinorityShareholders" xlink:label="loc_us-gaap_ProceedsFromMinorityShareholders_142EAF4B6EDFAFA89ABAFCD779D36278" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_372806CC0EF59986279FFCD779D3B162_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_372806CC0EF59986279FFCD779D3B162" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Cash used in financing activities </link:label>
<link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_372806CC0EF59986279FFCD779D3B162_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_372806CC0EF59986279FFCD779D3B162" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Cash Provided by (Used in) Financing Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_372806CC0EF59986279FFCD779D3B162" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_4505248A1D6B17C15E3AFCD779D3AB86_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_4505248A1D6B17C15E3AFCD779D3AB86" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> (Decrease) increase in cash </link:label>
<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_4505248A1D6B17C15E3AFCD779D3AB86_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_4505248A1D6B17C15E3AFCD779D3AB86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_4505248A1D6B17C15E3AFCD779D3AB86" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_FF0563AD44DF1EA27B83FCD779D3886E_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_FF0563AD44DF1EA27B83FCD779D3886E" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Cash at beginning of year </link:label>
<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_FF0563AD44DF1EA27B83FCD779D3886E_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_FF0563AD44DF1EA27B83FCD779D3886E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_FF0563AD44DF1EA27B83FCD779D3886E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_62AC230EEAE74A1E1DD5FCD779D3ECFB_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_62AC230EEAE74A1E1DD5FCD779D3ECFB" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Cash and restricted cash at end of year </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_62AC230EEAE74A1E1DD5FCD779D3ECFB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_0BCD2FA01786267924E9FCD779D37A70_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_0BCD2FA01786267924E9FCD779D37A70" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Supplemental Disclosure of Cash Flow Information </link:label>
<link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_0BCD2FA01786267924E9FCD779D37A70_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_0BCD2FA01786267924E9FCD779D37A70" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Supplemental Cash Flow Information [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_0BCD2FA01786267924E9FCD779D37A70" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeTaxesPaidNet_7EAADEFE527F71DC4ADFFCD779D3A7E7_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_7EAADEFE527F71DC4ADFFCD779D3A7E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash paid for income taxes </link:label>
<link:label id="lab_us-gaap_IncomeTaxesPaidNet_7EAADEFE527F71DC4ADFFCD779D3A7E7_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_7EAADEFE527F71DC4ADFFCD779D3A7E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Taxes Paid, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_7EAADEFE527F71DC4ADFFCD779D3A7E7" xlink:type="locator"/>
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<link:label id="lab_us-gaap_InterestPaidNet_FC2E2CEB9D492B91DC80FCD779D7A1A4_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet_FC2E2CEB9D492B91DC80FCD779D7A1A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash paid for interest </link:label>
<link:label id="lab_us-gaap_InterestPaidNet_FC2E2CEB9D492B91DC80FCD779D7A1A4_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet_FC2E2CEB9D492B91DC80FCD779D7A1A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Interest Paid, Excluding Capitalized Interest, Operating Activities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_us-gaap_InterestPaidNet_FC2E2CEB9D492B91DC80FCD779D7A1A4" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_8563B3B39596930E939EFCD779D73A61_terseLabel_en-US" xlink:label="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_8563B3B39596930E939EFCD779D73A61" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Supplemental Disclosure of Non-Cash Flow Information </link:label>
<link:label id="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_8563B3B39596930E939EFCD779D73A61_label_en-US" xlink:label="lab_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_8563B3B39596930E939EFCD779D73A61" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] </link:label>
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<link:label id="lab_ara_LiabilitiesAssumedTaxReceivableAgreement_3DDFA909B9598E4C9B3BFCD779D728DD_terseLabel_en-US" xlink:label="lab_ara_LiabilitiesAssumedTaxReceivableAgreement_3DDFA909B9598E4C9B3BFCD779D728DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Liability accrued for initial fair value of Tax Receivable Agreement </link:label>
<link:label id="lab_ara_LiabilitiesAssumedTaxReceivableAgreement_3DDFA909B9598E4C9B3BFCD779D728DD_label_en-US" xlink:label="lab_ara_LiabilitiesAssumedTaxReceivableAgreement_3DDFA909B9598E4C9B3BFCD779D728DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Liabilities Assumed, Tax Receivable Agreement </link:label>
<link:label id="lab_ara_LiabilitiesAssumedTaxReceivableAgreement_3DDFA909B9598E4C9B3BFCD779D728DD_documentation_en-US" xlink:label="lab_ara_LiabilitiesAssumedTaxReceivableAgreement_3DDFA909B9598E4C9B3BFCD779D728DD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Liabilities Assumed, Tax Receivable Agreement </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_LiabilitiesAssumedTaxReceivableAgreement" xlink:label="loc_ara_LiabilitiesAssumedTaxReceivableAgreement_3DDFA909B9598E4C9B3BFCD779D728DD" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DividendsPaidinkind_36920CE161C79D37DD09FCD779D75863_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPaidinkind_36920CE161C79D37DD09FCD779D75863" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Dividends declared not paid </link:label>
<link:label id="lab_us-gaap_DividendsPaidinkind_36920CE161C79D37DD09FCD779D75863_label_en-US" xlink:label="lab_us-gaap_DividendsPaidinkind_36920CE161C79D37DD09FCD779D75863" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Dividends, Paid-in-kind </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsPaidinkind" xlink:label="loc_us-gaap_DividendsPaidinkind_36920CE161C79D37DD09FCD779D75863" xlink:type="locator"/>
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<link:label id="lab_ara_AssetsAcquiredUnderCapitalLease_4BE14AC22BF9BC8479A7FCD779D7F42D_terseLabel_en-US" xlink:label="lab_ara_AssetsAcquiredUnderCapitalLease_4BE14AC22BF9BC8479A7FCD779D7F42D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Assets acquired under capital lease obligations </link:label>
<link:label id="lab_ara_AssetsAcquiredUnderCapitalLease_4BE14AC22BF9BC8479A7FCD779D7F42D_label_en-US" xlink:label="lab_ara_AssetsAcquiredUnderCapitalLease_4BE14AC22BF9BC8479A7FCD779D7F42D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Assets Acquired Under Capital Lease </link:label>
<link:label id="lab_ara_AssetsAcquiredUnderCapitalLease_4BE14AC22BF9BC8479A7FCD779D7F42D_documentation_en-US" xlink:label="lab_ara_AssetsAcquiredUnderCapitalLease_4BE14AC22BF9BC8479A7FCD779D7F42D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Assets Acquired Under Capital Lease </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_AssetsAcquiredUnderCapitalLease" xlink:label="loc_ara_AssetsAcquiredUnderCapitalLease_4BE14AC22BF9BC8479A7FCD779D7F42D" xlink:type="locator"/>
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<link:label id="lab_ara_NoncashChangeInLiabilitiesAssumed_7516335DA36A47000C53FCD779D7BC73_terseLabel_en-US" xlink:label="lab_ara_NoncashChangeInLiabilitiesAssumed_7516335DA36A47000C53FCD779D7BC73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Change in liability accrued for dividend equivalent payments </link:label>
<link:label id="lab_ara_NoncashChangeInLiabilitiesAssumed_7516335DA36A47000C53FCD779D7BC73_label_en-US" xlink:label="lab_ara_NoncashChangeInLiabilitiesAssumed_7516335DA36A47000C53FCD779D7BC73" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncash Change In Liabilities Assumed </link:label>
<link:label id="lab_ara_NoncashChangeInLiabilitiesAssumed_7516335DA36A47000C53FCD779D7BC73_documentation_en-US" xlink:label="lab_ara_NoncashChangeInLiabilitiesAssumed_7516335DA36A47000C53FCD779D7BC73" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Noncash Change In Liabilities Assumed </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_NoncashChangeInLiabilitiesAssumed" xlink:label="loc_ara_NoncashChangeInLiabilitiesAssumed_7516335DA36A47000C53FCD779D7BC73" xlink:type="locator"/>
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<link:label id="lab_ara_ContributionsFromNoncontrollingInterestsInFormOfReceivable_0DEFFBE0B317E8E726EBFCD779D75B99_terseLabel_en-US" xlink:label="lab_ara_ContributionsFromNoncontrollingInterestsInFormOfReceivable_0DEFFBE0B317E8E726EBFCD779D75B99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Contributions from noncontrolling interests in the form of a receivable </link:label>
<link:label id="lab_ara_ContributionsFromNoncontrollingInterestsInFormOfReceivable_0DEFFBE0B317E8E726EBFCD779D75B99_label_en-US" xlink:label="lab_ara_ContributionsFromNoncontrollingInterestsInFormOfReceivable_0DEFFBE0B317E8E726EBFCD779D75B99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Contributions from Noncontrolling Interests in Form of Receivable </link:label>
<link:label id="lab_ara_ContributionsFromNoncontrollingInterestsInFormOfReceivable_0DEFFBE0B317E8E726EBFCD779D75B99_documentation_en-US" xlink:label="lab_ara_ContributionsFromNoncontrollingInterestsInFormOfReceivable_0DEFFBE0B317E8E726EBFCD779D75B99" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> The amount of contributions from noncontrolling interests in the form of a receivable. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_ContributionsFromNoncontrollingInterestsInFormOfReceivable" xlink:label="loc_ara_ContributionsFromNoncontrollingInterestsInFormOfReceivable_0DEFFBE0B317E8E726EBFCD779D75B99" xlink:type="locator"/>
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<link:label id="lab_ara_AccruedPurchasesOfNoncontrollingInterests_F167CF30736CB7F82951FCD779D7171B_terseLabel_en-US" xlink:label="lab_ara_AccruedPurchasesOfNoncontrollingInterests_F167CF30736CB7F82951FCD779D7171B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Liability accrued for purchases of noncontrolling interests </link:label>
<link:label id="lab_ara_AccruedPurchasesOfNoncontrollingInterests_F167CF30736CB7F82951FCD779D7171B_label_en-US" xlink:label="lab_ara_AccruedPurchasesOfNoncontrollingInterests_F167CF30736CB7F82951FCD779D7171B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accrued Purchases Of Noncontrolling Interests </link:label>
<link:label id="lab_ara_AccruedPurchasesOfNoncontrollingInterests_F167CF30736CB7F82951FCD779D7171B_documentation_en-US" xlink:label="lab_ara_AccruedPurchasesOfNoncontrollingInterests_F167CF30736CB7F82951FCD779D7171B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Accrued Purchases Of Noncontrolling Interests </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_AccruedPurchasesOfNoncontrollingInterests" xlink:label="loc_ara_AccruedPurchasesOfNoncontrollingInterests_F167CF30736CB7F82951FCD779D7171B" xlink:type="locator"/>
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<link:label id="lab_ara_NonCashPortionOfLongTermDebtRefinancing_6D6B627516B76AE85B39FCD779D746F7_terseLabel_en-US" xlink:label="lab_ara_NonCashPortionOfLongTermDebtRefinancing_6D6B627516B76AE85B39FCD779D746F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Non-cash portion of long-term debt refinancing </link:label>
<link:label id="lab_ara_NonCashPortionOfLongTermDebtRefinancing_6D6B627516B76AE85B39FCD779D746F7_label_en-US" xlink:label="lab_ara_NonCashPortionOfLongTermDebtRefinancing_6D6B627516B76AE85B39FCD779D746F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Non-Cash Portion Of Long-Term Debt Refinancing </link:label>
<link:label id="lab_ara_NonCashPortionOfLongTermDebtRefinancing_6D6B627516B76AE85B39FCD779D746F7_documentation_en-US" xlink:label="lab_ara_NonCashPortionOfLongTermDebtRefinancing_6D6B627516B76AE85B39FCD779D746F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Non-Cash Portion Of Long-Term Debt Refinancing </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_NonCashPortionOfLongTermDebtRefinancing" xlink:label="loc_ara_NonCashPortionOfLongTermDebtRefinancing_6D6B627516B76AE85B39FCD779D746F7" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentsTextBlock_4A737FF0B68B4B83B5C5958D857D91EF_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentsTextBlock_4A737FF0B68B4B83B5C5958D857D91EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Restated Consolidated Financial Statements </link:label>
<link:label id="lab_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentsTextBlock_4A737FF0B68B4B83B5C5958D857D91EF_label_en-US" xlink:label="lab_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentsTextBlock_4A737FF0B68B4B83B5C5958D857D91EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentsTextBlock" xlink:label="loc_us-gaap_ScheduleOfErrorCorrectionsAndPriorPeriodAdjustmentsTextBlock_4A737FF0B68B4B83B5C5958D857D91EF" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeStatementLocationAxis_4B5257F68DB5B50B667B958D83F63216_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_4B5257F68DB5B50B667B958D83F63216" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income Statement Location [Axis] </link:label>
<link:label id="lab_us-gaap_IncomeStatementLocationAxis_4B5257F68DB5B50B667B958D83F63216_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_4B5257F68DB5B50B667B958D83F63216" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Statement Location [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_4B5257F68DB5B50B667B958D83F63216" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeStatementLocationDomain_BD8FF87D72FC81957CA4958D83F62F71_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_BD8FF87D72FC81957CA4958D83F62F71" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income Statement Location [Domain] </link:label>
<link:label id="lab_us-gaap_IncomeStatementLocationDomain_BD8FF87D72FC81957CA4958D83F62F71_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_BD8FF87D72FC81957CA4958D83F62F71" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Statement Location [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_BD8FF87D72FC81957CA4958D83F62F71" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OperatingExpenseMember_9788A9AF1917D0F3ED3A958D83F6EFDB_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingExpenseMember_9788A9AF1917D0F3ED3A958D83F6EFDB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Patient care costs </link:label>
<link:label id="lab_us-gaap_OperatingExpenseMember_9788A9AF1917D0F3ED3A958D83F6EFDB_label_en-US" xlink:label="lab_us-gaap_OperatingExpenseMember_9788A9AF1917D0F3ED3A958D83F6EFDB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Expense [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenseMember" xlink:label="loc_us-gaap_OperatingExpenseMember_9788A9AF1917D0F3ED3A958D83F6EFDB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GeneralAndAdministrativeExpenseMember_D7859E689035B4BB1AD1958D83F6A158_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpenseMember_D7859E689035B4BB1AD1958D83F6A158" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> General and administrative </link:label>
<link:label id="lab_us-gaap_GeneralAndAdministrativeExpenseMember_D7859E689035B4BB1AD1958D83F6A158_label_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpenseMember_D7859E689035B4BB1AD1958D83F6A158" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> General and Administrative Expense [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_D7859E689035B4BB1AD1958D83F6A158" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StatementLineItems_053BA48D562BD42C7E1B958D83F680B8_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems_053BA48D562BD42C7E1B958D83F680B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Statement [Line Items] </link:label>
<link:label id="lab_us-gaap_StatementLineItems_053BA48D562BD42C7E1B958D83F680B8_label_en-US" xlink:label="lab_us-gaap_StatementLineItems_053BA48D562BD42C7E1B958D83F680B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_053BA48D562BD42C7E1B958D83F680B8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_7D77C43A35A0092F4638958D83F6DFD3_terseLabel_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_7D77C43A35A0092F4638958D83F6DFD3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Total stock‑based compensation </link:label>
<link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_7D77C43A35A0092F4638958D83F6DFD3_label_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_7D77C43A35A0092F4638958D83F6DFD3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_7D77C43A35A0092F4638958D83F6DFD3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_7E0B03D0924125FAEBFE958D83F6E6EF_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_7E0B03D0924125FAEBFE958D83F6E6EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income tax benefit </link:label>
<link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_7E0B03D0924125FAEBFE958D83F6E6EF_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_7E0B03D0924125FAEBFE958D83F6E6EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Expense, Tax Benefit </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_4BA5D441AC7D0F8F601CD3C1846F5EDB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_7C160225E8B0CAD2C35FD3C1846FBC3B_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_7C160225E8B0CAD2C35FD3C1846FBC3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Redemption, Period One </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_7C160225E8B0CAD2C35FD3C1846FBC3B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_A095BE9BE391EA163120D3C1846F871D_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_A095BE9BE391EA163120D3C1846F871D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Redemption, Period Two </link:label>
<link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_A095BE9BE391EA163120D3C1846F871D_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_A095BE9BE391EA163120D3C1846F871D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Redemption, Period Two [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_A095BE9BE391EA163120D3C1846F871D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_857703C812038DE58683D3C18470018E_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_857703C812038DE58683D3C18470018E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Hedging Relationship [Axis] </link:label>
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<link:label id="lab_us-gaap_HedgingRelationshipDomain_E8E4B350619DB742FE76D3C184702EC6_terseLabel_en-US" xlink:label="lab_us-gaap_HedgingRelationshipDomain_E8E4B350619DB742FE76D3C184702EC6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Hedging Relationship [Domain] </link:label>
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<link:label id="lab_us-gaap_CashFlowHedgingMember_B6B0266D2EA216F0286BD3C184719BED_terseLabel_en-US" xlink:label="lab_us-gaap_CashFlowHedgingMember_B6B0266D2EA216F0286BD3C184719BED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash flow hedge </link:label>
<link:label id="lab_us-gaap_CashFlowHedgingMember_B6B0266D2EA216F0286BD3C184719BED_label_en-US" xlink:label="lab_us-gaap_CashFlowHedgingMember_B6B0266D2EA216F0286BD3C184719BED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Cash Flow Hedging [Member] </link:label>
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<link:label id="lab_us-gaap_LongtermDebtTypeAxis_0E005ADC957A01231164D3C184731A0E_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis_0E005ADC957A01231164D3C184731A0E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Type [Axis] </link:label>
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<link:label id="lab_us-gaap_LineOfCreditMember_7AA97D7F2C7831AF4B6BD3C1847316D9_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_7AA97D7F2C7831AF4B6BD3C1847316D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Lines of Credit </link:label>
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<link:label id="lab_us-gaap_MediumTermNotesMember_0D5CD0ECE173AB0F19D8D3C18473A4EB_terseLabel_en-US" xlink:label="lab_us-gaap_MediumTermNotesMember_0D5CD0ECE173AB0F19D8D3C18473A4EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Term loans </link:label>
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<link:label id="lab_us-gaap_DebtInstrumentAxis_C1ECA6F907474564DF6DD3C18473F2AD_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_C1ECA6F907474564DF6DD3C18473F2AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument [Axis] </link:label>
<link:label id="lab_us-gaap_DebtInstrumentAxis_C1ECA6F907474564DF6DD3C18473F2AD_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_C1ECA6F907474564DF6DD3C18473F2AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_C1ECA6F907474564DF6DD3C18473F2AD" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DebtInstrumentNameDomain_321E46FD5BA46CF220A5D3C18473BFC8_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_321E46FD5BA46CF220A5D3C18473BFC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Name [Domain] </link:label>
<link:label id="lab_us-gaap_DebtInstrumentNameDomain_321E46FD5BA46CF220A5D3C18473BFC8_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_321E46FD5BA46CF220A5D3C18473BFC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Name [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_321E46FD5BA46CF220A5D3C18473BFC8" xlink:type="locator"/>
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<link:label id="lab_ara_CreditAgreement2017Member_D5C219E8114561D8F4DBD3C18474E132_terseLabel_en-US" xlink:label="lab_ara_CreditAgreement2017Member_D5C219E8114561D8F4DBD3C18474E132" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2017 Credit Agreement </link:label>
<link:label id="lab_ara_CreditAgreement2017Member_D5C219E8114561D8F4DBD3C18474E132_label_en-US" xlink:label="lab_ara_CreditAgreement2017Member_D5C219E8114561D8F4DBD3C18474E132" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Agreement 2017 [Member] </link:label>
<link:label id="lab_ara_CreditAgreement2017Member_D5C219E8114561D8F4DBD3C18474E132_documentation_en-US" xlink:label="lab_ara_CreditAgreement2017Member_D5C219E8114561D8F4DBD3C18474E132" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Credit Agreement 2017 [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_CreditAgreement2017Member" xlink:label="loc_ara_CreditAgreement2017Member_D5C219E8114561D8F4DBD3C18474E132" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_CreditAgreement2017Member_D5C219E8114561D8F4DBD3C18474E132" xlink:to="lab_ara_CreditAgreement2017Member_D5C219E8114561D8F4DBD3C18474E132" xlink:type="arc"/>
<link:label id="lab_ara_FirstLienCreditAgreementSecondAmendmentMember_087BE5E44953DCBC3BE7D3C184740068_terseLabel_en-US" xlink:label="lab_ara_FirstLienCreditAgreementSecondAmendmentMember_087BE5E44953DCBC3BE7D3C184740068" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> First Lien Credit Agreement, Second Amendment </link:label>
<link:label id="lab_ara_FirstLienCreditAgreementSecondAmendmentMember_087BE5E44953DCBC3BE7D3C184740068_label_en-US" xlink:label="lab_ara_FirstLienCreditAgreementSecondAmendmentMember_087BE5E44953DCBC3BE7D3C184740068" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> First Lien Credit Agreement, Second Amendment [Member] </link:label>
<link:label id="lab_ara_FirstLienCreditAgreementSecondAmendmentMember_087BE5E44953DCBC3BE7D3C184740068_documentation_en-US" xlink:label="lab_ara_FirstLienCreditAgreementSecondAmendmentMember_087BE5E44953DCBC3BE7D3C184740068" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Relates to the First Lien Credit Agreement, second amendment </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_FirstLienCreditAgreementSecondAmendmentMember" xlink:label="loc_ara_FirstLienCreditAgreementSecondAmendmentMember_087BE5E44953DCBC3BE7D3C184740068" xlink:type="locator"/>
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<link:label id="lab_ara_TermBLoansDueSeptember2019Member_9D022FF92888605A2AC8D3C1847445CA_terseLabel_en-US" xlink:label="lab_ara_TermBLoansDueSeptember2019Member_9D022FF92888605A2AC8D3C1847445CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Term B Loans due September 2019 </link:label>
<link:label id="lab_ara_TermBLoansDueSeptember2019Member_9D022FF92888605A2AC8D3C1847445CA_label_en-US" xlink:label="lab_ara_TermBLoansDueSeptember2019Member_9D022FF92888605A2AC8D3C1847445CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Term B Loans Due September2019 [Member] </link:label>
<link:label id="lab_ara_TermBLoansDueSeptember2019Member_9D022FF92888605A2AC8D3C1847445CA_documentation_en-US" xlink:label="lab_ara_TermBLoansDueSeptember2019Member_9D022FF92888605A2AC8D3C1847445CA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents information about Term B Loans issued March 22, 2013 with a balloon payment due September 2019. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_TermBLoansDueSeptember2019Member" xlink:label="loc_ara_TermBLoansDueSeptember2019Member_9D022FF92888605A2AC8D3C1847445CA" xlink:type="locator"/>
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<link:label id="lab_ara_CreditAgreement2017FirstAmendmentMember_9B1E4A37B3D283CEAA47D3C184745BF8_terseLabel_en-US" xlink:label="lab_ara_CreditAgreement2017FirstAmendmentMember_9B1E4A37B3D283CEAA47D3C184745BF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2017 Credit Agreement, First Amendment </link:label>
<link:label id="lab_ara_CreditAgreement2017FirstAmendmentMember_9B1E4A37B3D283CEAA47D3C184745BF8_label_en-US" xlink:label="lab_ara_CreditAgreement2017FirstAmendmentMember_9B1E4A37B3D283CEAA47D3C184745BF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Agreement 2017, First Amendment [Member] </link:label>
<link:label id="lab_ara_CreditAgreement2017FirstAmendmentMember_9B1E4A37B3D283CEAA47D3C184745BF8_documentation_en-US" xlink:label="lab_ara_CreditAgreement2017FirstAmendmentMember_9B1E4A37B3D283CEAA47D3C184745BF8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Credit Agreement 2017, First Amendment [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_CreditAgreement2017FirstAmendmentMember" xlink:label="loc_ara_CreditAgreement2017FirstAmendmentMember_9B1E4A37B3D283CEAA47D3C184745BF8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_VariableRateAxis_A89ADB398B90F6CB04DFD3C184742BEA_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis_A89ADB398B90F6CB04DFD3C184742BEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Variable Rate [Axis] </link:label>
<link:label id="lab_us-gaap_VariableRateAxis_A89ADB398B90F6CB04DFD3C184742BEA_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis_A89ADB398B90F6CB04DFD3C184742BEA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Variable Rate [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_A89ADB398B90F6CB04DFD3C184742BEA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateAxis_A89ADB398B90F6CB04DFD3C184742BEA" xlink:to="lab_us-gaap_VariableRateAxis_A89ADB398B90F6CB04DFD3C184742BEA" xlink:type="arc"/>
<link:label id="lab_us-gaap_VariableRateDomain_4C9BEE349CB3FE648A0CD3C184750DA9_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateDomain_4C9BEE349CB3FE648A0CD3C184750DA9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Variable Rate [Domain] </link:label>
<link:label id="lab_us-gaap_VariableRateDomain_4C9BEE349CB3FE648A0CD3C184750DA9_label_en-US" xlink:label="lab_us-gaap_VariableRateDomain_4C9BEE349CB3FE648A0CD3C184750DA9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Variable Rate [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_4C9BEE349CB3FE648A0CD3C184750DA9" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FederalFundsEffectiveSwapRateMember_B840782CB97BCA9AFF03D3C1847516C5_terseLabel_en-US" xlink:label="lab_us-gaap_FederalFundsEffectiveSwapRateMember_B840782CB97BCA9AFF03D3C1847516C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Federal funds effective rate </link:label>
<link:label id="lab_us-gaap_FederalFundsEffectiveSwapRateMember_B840782CB97BCA9AFF03D3C1847516C5_label_en-US" xlink:label="lab_us-gaap_FederalFundsEffectiveSwapRateMember_B840782CB97BCA9AFF03D3C1847516C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fed Funds Effective Rate Overnight Index Swap Rate [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FederalFundsEffectiveSwapRateMember" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_B840782CB97BCA9AFF03D3C1847516C5" xlink:type="locator"/>
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<link:label id="lab_us-gaap_EurodollarMember_AF187FE80BB41D7C9EC8D3C18475ECEF_terseLabel_en-US" xlink:label="lab_us-gaap_EurodollarMember_AF187FE80BB41D7C9EC8D3C18475ECEF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Eurodollar base rate </link:label>
<link:label id="lab_us-gaap_EurodollarMember_AF187FE80BB41D7C9EC8D3C18475ECEF_label_en-US" xlink:label="lab_us-gaap_EurodollarMember_AF187FE80BB41D7C9EC8D3C18475ECEF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Eurodollar [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EurodollarMember" xlink:label="loc_us-gaap_EurodollarMember_AF187FE80BB41D7C9EC8D3C18475ECEF" xlink:type="locator"/>
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<link:label id="lab_ara_AlternateBaseRateMember_1A9242B93F37CC6D4F08D3C184753455_terseLabel_en-US" xlink:label="lab_ara_AlternateBaseRateMember_1A9242B93F37CC6D4F08D3C184753455" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Alternate base rate </link:label>
<link:label id="lab_ara_AlternateBaseRateMember_1A9242B93F37CC6D4F08D3C184753455_label_en-US" xlink:label="lab_ara_AlternateBaseRateMember_1A9242B93F37CC6D4F08D3C184753455" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Alternate Base Rate [Member] </link:label>
<link:label id="lab_ara_AlternateBaseRateMember_1A9242B93F37CC6D4F08D3C184753455_documentation_en-US" xlink:label="lab_ara_AlternateBaseRateMember_1A9242B93F37CC6D4F08D3C184753455" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Alternate Base Rate [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_AlternateBaseRateMember" xlink:label="loc_ara_AlternateBaseRateMember_1A9242B93F37CC6D4F08D3C184753455" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_5D80789384F21C54BAFCD3C18475CD7B_terseLabel_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_5D80789384F21C54BAFCD3C18475CD7B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> LIBOR </link:label>
<link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_5D80789384F21C54BAFCD3C18475CD7B_label_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_5D80789384F21C54BAFCD3C18475CD7B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> London Interbank Offered Rate (LIBOR) [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_5D80789384F21C54BAFCD3C18475CD7B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_BaseRateMember_310D98CE018DEA68E844D3C18476C807_terseLabel_en-US" xlink:label="lab_us-gaap_BaseRateMember_310D98CE018DEA68E844D3C18476C807" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Base Rate </link:label>
<link:label id="lab_us-gaap_BaseRateMember_310D98CE018DEA68E844D3C18476C807_label_en-US" xlink:label="lab_us-gaap_BaseRateMember_310D98CE018DEA68E844D3C18476C807" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Base Rate [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BaseRateMember" xlink:label="loc_us-gaap_BaseRateMember_310D98CE018DEA68E844D3C18476C807" xlink:type="locator"/>
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<link:label id="lab_ara_AlternateBaseRateOrLondonInterbankOfferedRateLIBORMember_EED25477FD13B65D8EB7D3C184766BE5_terseLabel_en-US" xlink:label="lab_ara_AlternateBaseRateOrLondonInterbankOfferedRateLIBORMember_EED25477FD13B65D8EB7D3C184766BE5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Alternate Base Rate Or London Interbank Offered Rate (LIBOR) </link:label>
<link:label id="lab_ara_AlternateBaseRateOrLondonInterbankOfferedRateLIBORMember_EED25477FD13B65D8EB7D3C184766BE5_label_en-US" xlink:label="lab_ara_AlternateBaseRateOrLondonInterbankOfferedRateLIBORMember_EED25477FD13B65D8EB7D3C184766BE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Alternate Base Rate Or London Interbank Offered Rate (LIBOR) [Member] </link:label>
<link:label id="lab_ara_AlternateBaseRateOrLondonInterbankOfferedRateLIBORMember_EED25477FD13B65D8EB7D3C184766BE5_documentation_en-US" xlink:label="lab_ara_AlternateBaseRateOrLondonInterbankOfferedRateLIBORMember_EED25477FD13B65D8EB7D3C184766BE5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Alternate Base Rate Or London Interbank Offered Rate (LIBOR) [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_AlternateBaseRateOrLondonInterbankOfferedRateLIBORMember" xlink:label="loc_ara_AlternateBaseRateOrLondonInterbankOfferedRateLIBORMember_EED25477FD13B65D8EB7D3C184766BE5" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_7D94DE590B77EE28BA6FD3C184761818_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_7D94DE590B77EE28BA6FD3C184761818" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Derivative Instrument [Axis] </link:label>
<link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_7D94DE590B77EE28BA6FD3C184761818_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_7D94DE590B77EE28BA6FD3C184761818" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Derivative Instrument [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_7D94DE590B77EE28BA6FD3C184761818" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_7D94DE590B77EE28BA6FD3C184761818" xlink:to="lab_us-gaap_DerivativeInstrumentRiskAxis_7D94DE590B77EE28BA6FD3C184761818" xlink:type="arc"/>
<link:label id="lab_us-gaap_DerivativeContractTypeDomain_714DCBF014DB4AD52066D3C18476BFF0_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain_714DCBF014DB4AD52066D3C18476BFF0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Derivative Contract [Domain] </link:label>
<link:label id="lab_us-gaap_DerivativeContractTypeDomain_714DCBF014DB4AD52066D3C18476BFF0_label_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain_714DCBF014DB4AD52066D3C18476BFF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Derivative Contract [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_714DCBF014DB4AD52066D3C18476BFF0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_714DCBF014DB4AD52066D3C18476BFF0" xlink:to="lab_us-gaap_DerivativeContractTypeDomain_714DCBF014DB4AD52066D3C18476BFF0" xlink:type="arc"/>
<link:label id="lab_us-gaap_InterestRateSwapMember_1866CF5F4D9FC65071F5D3C184762E4D_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember_1866CF5F4D9FC65071F5D3C184762E4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate swap agreements </link:label>
<link:label id="lab_us-gaap_InterestRateSwapMember_1866CF5F4D9FC65071F5D3C184762E4D_label_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember_1866CF5F4D9FC65071F5D3C184762E4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Interest Rate Swap [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_1866CF5F4D9FC65071F5D3C184762E4D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateSwapMember_1866CF5F4D9FC65071F5D3C184762E4D" xlink:to="lab_us-gaap_InterestRateSwapMember_1866CF5F4D9FC65071F5D3C184762E4D" xlink:type="arc"/>
<link:label id="lab_us-gaap_InterestRateCapMember_DB2A2EB011BBFF8F9AB3D3C18477CF3F_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateCapMember_DB2A2EB011BBFF8F9AB3D3C18477CF3F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate cap agreements </link:label>
<link:label id="lab_us-gaap_InterestRateCapMember_DB2A2EB011BBFF8F9AB3D3C18477CF3F_label_en-US" xlink:label="lab_us-gaap_InterestRateCapMember_DB2A2EB011BBFF8F9AB3D3C18477CF3F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Interest Rate Cap [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestRateCapMember" xlink:label="loc_us-gaap_InterestRateCapMember_DB2A2EB011BBFF8F9AB3D3C18477CF3F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateCapMember_DB2A2EB011BBFF8F9AB3D3C18477CF3F" xlink:to="lab_us-gaap_InterestRateCapMember_DB2A2EB011BBFF8F9AB3D3C18477CF3F" xlink:type="arc"/>
<link:label id="lab_us-gaap_CreditFacilityAxis_BDD0D4E27701C7847A95D3C184776B1F_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis_BDD0D4E27701C7847A95D3C184776B1F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Credit Facility [Axis] </link:label>
<link:label id="lab_us-gaap_CreditFacilityAxis_BDD0D4E27701C7847A95D3C184776B1F_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis_BDD0D4E27701C7847A95D3C184776B1F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Facility [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_BDD0D4E27701C7847A95D3C184776B1F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityAxis_BDD0D4E27701C7847A95D3C184776B1F" xlink:to="lab_us-gaap_CreditFacilityAxis_BDD0D4E27701C7847A95D3C184776B1F" xlink:type="arc"/>
<link:label id="lab_us-gaap_CreditFacilityDomain_F49B3FA8F40ADB2BA8C1D3C1847754AE_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_F49B3FA8F40ADB2BA8C1D3C1847754AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Credit Facility [Domain] </link:label>
<link:label id="lab_us-gaap_CreditFacilityDomain_F49B3FA8F40ADB2BA8C1D3C1847754AE_label_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain_F49B3FA8F40ADB2BA8C1D3C1847754AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Credit Facility [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_F49B3FA8F40ADB2BA8C1D3C1847754AE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityDomain_F49B3FA8F40ADB2BA8C1D3C1847754AE" xlink:to="lab_us-gaap_CreditFacilityDomain_F49B3FA8F40ADB2BA8C1D3C1847754AE" xlink:type="arc"/>
<link:label id="lab_us-gaap_RevolvingCreditFacilityMember_5F7FDE700A4B1F4C8028D3C184775B86_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_5F7FDE700A4B1F4C8028D3C184775B86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Revolving Credit Facility </link:label>
<link:label id="lab_us-gaap_RevolvingCreditFacilityMember_5F7FDE700A4B1F4C8028D3C184775B86_label_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_5F7FDE700A4B1F4C8028D3C184775B86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revolving Credit Facility [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_5F7FDE700A4B1F4C8028D3C184775B86" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember_5F7FDE700A4B1F4C8028D3C184775B86" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember_5F7FDE700A4B1F4C8028D3C184775B86" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentLineItems_369D0EBA3658D7B31445D3C18478616D_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_369D0EBA3658D7B31445D3C18478616D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> LONG-TERM DEBT </link:label>
<link:label id="lab_us-gaap_DebtInstrumentLineItems_369D0EBA3658D7B31445D3C18478616D_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_369D0EBA3658D7B31445D3C18478616D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_369D0EBA3658D7B31445D3C18478616D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentLineItems_369D0EBA3658D7B31445D3C18478616D" xlink:to="lab_us-gaap_DebtInstrumentLineItems_369D0EBA3658D7B31445D3C18478616D" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_8C79AB1F70E669BFA825D3C184784EC7_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_8C79AB1F70E669BFA825D3C184784EC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Mandatory principal payment </link:label>
<link:label id="lab_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_8C79AB1F70E669BFA825D3C184784EC7_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_8C79AB1F70E669BFA825D3C184784EC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Periodic Payment, Principal </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentPeriodicPaymentPrincipal" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_8C79AB1F70E669BFA825D3C184784EC7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_8C79AB1F70E669BFA825D3C184784EC7" xlink:to="lab_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_8C79AB1F70E669BFA825D3C184784EC7" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCredit_344D6DC26C6676E4A2B5D3C184784E44_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit_344D6DC26C6676E4A2B5D3C184784E44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Revolving credit facility borrowings outstanding </link:label>
<link:label id="lab_us-gaap_LineOfCredit_344D6DC26C6676E4A2B5D3C184784E44_label_en-US" xlink:label="lab_us-gaap_LineOfCredit_344D6DC26C6676E4A2B5D3C184784E44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Line of Credit </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_344D6DC26C6676E4A2B5D3C184784E44" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCredit_344D6DC26C6676E4A2B5D3C184784E44" xlink:to="lab_us-gaap_LineOfCredit_344D6DC26C6676E4A2B5D3C184784E44" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AB232B9EE6305BBFD18D3C18478A800_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AB232B9EE6305BBFD18D3C18478A800" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Revolving credit facility maximum borrowing capacity </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AB232B9EE6305BBFD18D3C18478A800_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AB232B9EE6305BBFD18D3C18478A800" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Maximum Borrowing Capacity </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AB232B9EE6305BBFD18D3C18478A800" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AB232B9EE6305BBFD18D3C18478A800" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AB232B9EE6305BBFD18D3C18478A800" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentFaceAmount_C2A3DDD845C3B761275ED3C184785F59_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_C2A3DDD845C3B761275ED3C184785F59" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt face amount </link:label>
<link:label id="lab_us-gaap_DebtInstrumentFaceAmount_C2A3DDD845C3B761275ED3C184785F59_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_C2A3DDD845C3B761275ED3C184785F59" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Face Amount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_C2A3DDD845C3B761275ED3C184785F59" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount_C2A3DDD845C3B761275ED3C184785F59" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount_C2A3DDD845C3B761275ED3C184785F59" xlink:type="arc"/>
<link:label id="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimit_18DF54DBD69008336B72D3C1847867B1_terseLabel_en-US" xlink:label="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimit_18DF54DBD69008336B72D3C1847867B1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Incremental accordion facility amount </link:label>
<link:label id="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimit_18DF54DBD69008336B72D3C1847867B1_label_en-US" xlink:label="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimit_18DF54DBD69008336B72D3C1847867B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line Of Credit Facility, Accordion Feature, Increase Limit </link:label>
<link:label id="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimit_18DF54DBD69008336B72D3C1847867B1_documentation_en-US" xlink:label="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimit_18DF54DBD69008336B72D3C1847867B1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Line Of Credit Facility, Accordion Feature, Increase Limit </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_LineOfCreditFacilityAccordionFeatureIncreaseLimit" xlink:label="loc_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimit_18DF54DBD69008336B72D3C1847867B1" xlink:type="locator"/>
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<link:label id="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimitPercentageOfConsolidatedEBITDA_E0C72DAC86E6AC7201F5D3C184797ECF_terseLabel_en-US" xlink:label="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimitPercentageOfConsolidatedEBITDA_E0C72DAC86E6AC7201F5D3C184797ECF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Incremental accordion feature percentage of EBITDA </link:label>
<link:label id="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimitPercentageOfConsolidatedEBITDA_E0C72DAC86E6AC7201F5D3C184797ECF_label_en-US" xlink:label="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimitPercentageOfConsolidatedEBITDA_E0C72DAC86E6AC7201F5D3C184797ECF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line Of Credit Facility, Accordion Feature, Increase Limit, Percentage Of Consolidated EBITDA </link:label>
<link:label id="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimitPercentageOfConsolidatedEBITDA_E0C72DAC86E6AC7201F5D3C184797ECF_documentation_en-US" xlink:label="lab_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimitPercentageOfConsolidatedEBITDA_E0C72DAC86E6AC7201F5D3C184797ECF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Line Of Credit Facility, Accordion Feature, Increase Limit, Percentage Of Consolidated EBITDA </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_LineOfCreditFacilityAccordionFeatureIncreaseLimitPercentageOfConsolidatedEBITDA" xlink:label="loc_ara_LineOfCreditFacilityAccordionFeatureIncreaseLimitPercentageOfConsolidatedEBITDA_E0C72DAC86E6AC7201F5D3C184797ECF" xlink:type="locator"/>
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<link:label id="lab_ara_DebtIssuanceCostsDiscountAndTransactionCosts_148BD9C472ECAC3B8999D3C1847957B2_terseLabel_en-US" xlink:label="lab_ara_DebtIssuanceCostsDiscountAndTransactionCosts_148BD9C472ECAC3B8999D3C1847957B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Costs associated with refinancing activities </link:label>
<link:label id="lab_ara_DebtIssuanceCostsDiscountAndTransactionCosts_148BD9C472ECAC3B8999D3C1847957B2_label_en-US" xlink:label="lab_ara_DebtIssuanceCostsDiscountAndTransactionCosts_148BD9C472ECAC3B8999D3C1847957B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Issuance Costs, Discount, And Transaction Costs </link:label>
<link:label id="lab_ara_DebtIssuanceCostsDiscountAndTransactionCosts_148BD9C472ECAC3B8999D3C1847957B2_documentation_en-US" xlink:label="lab_ara_DebtIssuanceCostsDiscountAndTransactionCosts_148BD9C472ECAC3B8999D3C1847957B2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Debt Issuance Costs, Discount, And Transaction Costs </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_DebtIssuanceCostsDiscountAndTransactionCosts" xlink:label="loc_ara_DebtIssuanceCostsDiscountAndTransactionCosts_148BD9C472ECAC3B8999D3C1847957B2" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_DebtIssuanceCostsDiscountAndTransactionCosts_148BD9C472ECAC3B8999D3C1847957B2" xlink:to="lab_ara_DebtIssuanceCostsDiscountAndTransactionCosts_148BD9C472ECAC3B8999D3C1847957B2" xlink:type="arc"/>
<link:label id="lab_ara_TransactionCosts_01CAF20A20028FA1D911D3C18479783C_terseLabel_en-US" xlink:label="lab_ara_TransactionCosts_01CAF20A20028FA1D911D3C18479783C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Transaction costs </link:label>
<link:label id="lab_ara_TransactionCosts_01CAF20A20028FA1D911D3C18479783C_label_en-US" xlink:label="lab_ara_TransactionCosts_01CAF20A20028FA1D911D3C18479783C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Transaction Costs </link:label>
<link:label id="lab_ara_TransactionCosts_01CAF20A20028FA1D911D3C18479783C_documentation_en-US" xlink:label="lab_ara_TransactionCosts_01CAF20A20028FA1D911D3C18479783C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Costs associated with debt refinancing and other IPO related transactions. These costs include legal, accounting, valuation and other professional or consulting fees. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_TransactionCosts" xlink:label="loc_ara_TransactionCosts_01CAF20A20028FA1D911D3C18479783C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_TransactionCosts_01CAF20A20028FA1D911D3C18479783C" xlink:to="lab_ara_TransactionCosts_01CAF20A20028FA1D911D3C18479783C" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscount_ECD411B36819704B1CB5D3C184792B56_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscount_ECD411B36819704B1CB5D3C184792B56" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt discounts </link:label>
<link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscount_ECD411B36819704B1CB5D3C184792B56_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscount_ECD411B36819704B1CB5D3C184792B56" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Unamortized Discount </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_ECD411B36819704B1CB5D3C184792B56" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscount_ECD411B36819704B1CB5D3C184792B56" xlink:to="lab_us-gaap_DebtInstrumentUnamortizedDiscount_ECD411B36819704B1CB5D3C184792B56" xlink:type="arc"/>
<link:label id="lab_us-gaap_DeferredFinanceCostsGross_006DFDEEA90622067082D3C18479EC11_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsGross_006DFDEEA90622067082D3C18479EC11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Deferred debt issuance costs </link:label>
<link:label id="lab_us-gaap_DeferredFinanceCostsGross_006DFDEEA90622067082D3C18479EC11_label_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsGross_006DFDEEA90622067082D3C18479EC11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Issuance Costs, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredFinanceCostsGross" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_006DFDEEA90622067082D3C18479EC11" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredFinanceCostsGross_006DFDEEA90622067082D3C18479EC11" xlink:to="lab_us-gaap_DeferredFinanceCostsGross_006DFDEEA90622067082D3C18479EC11" xlink:type="arc"/>
<link:label id="lab_us-gaap_WriteOffOfDeferredDebtIssuanceCost_F98D0D67E802A86CC562D3C18479BE70_terseLabel_en-US" xlink:label="lab_us-gaap_WriteOffOfDeferredDebtIssuanceCost_F98D0D67E802A86CC562D3C18479BE70" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Write-off of deferred financing fees </link:label>
<link:label id="lab_us-gaap_WriteOffOfDeferredDebtIssuanceCost_F98D0D67E802A86CC562D3C18479BE70_label_en-US" xlink:label="lab_us-gaap_WriteOffOfDeferredDebtIssuanceCost_F98D0D67E802A86CC562D3C18479BE70" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Write off of Deferred Debt Issuance Cost </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_F98D0D67E802A86CC562D3C18479BE70" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_F98D0D67E802A86CC562D3C18479BE70" xlink:to="lab_us-gaap_WriteOffOfDeferredDebtIssuanceCost_F98D0D67E802A86CC562D3C18479BE70" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_EC49BD3EB5FD4C0BD594D3C18479619D_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_EC49BD3EB5FD4C0BD594D3C18479619D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Applicable margin </link:label>
<link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_EC49BD3EB5FD4C0BD594D3C18479619D_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_EC49BD3EB5FD4C0BD594D3C18479619D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Basis Spread on Variable Rate </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_EC49BD3EB5FD4C0BD594D3C18479619D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_EC49BD3EB5FD4C0BD594D3C18479619D" xlink:to="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_EC49BD3EB5FD4C0BD594D3C18479619D" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_5B7EEC07602E679F16C3D3C1847AAB1A_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_5B7EEC07602E679F16C3D3C1847AAB1A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate </link:label>
<link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_5B7EEC07602E679F16C3D3C1847AAB1A_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_5B7EEC07602E679F16C3D3C1847AAB1A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Interest Rate, Stated Percentage </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_5B7EEC07602E679F16C3D3C1847AAB1A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_5B7EEC07602E679F16C3D3C1847AAB1A" xlink:to="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_5B7EEC07602E679F16C3D3C1847AAB1A" xlink:type="arc"/>
<link:label id="lab_ara_DebtInstrumentRequiredPrepayment_9F3E3F036BC6F0923584D3C1847A6BCC_terseLabel_en-US" xlink:label="lab_ara_DebtInstrumentRequiredPrepayment_9F3E3F036BC6F0923584D3C1847A6BCC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Required prepayment </link:label>
<link:label id="lab_ara_DebtInstrumentRequiredPrepayment_9F3E3F036BC6F0923584D3C1847A6BCC_label_en-US" xlink:label="lab_ara_DebtInstrumentRequiredPrepayment_9F3E3F036BC6F0923584D3C1847A6BCC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Required Prepayment </link:label>
<link:label id="lab_ara_DebtInstrumentRequiredPrepayment_9F3E3F036BC6F0923584D3C1847A6BCC_documentation_en-US" xlink:label="lab_ara_DebtInstrumentRequiredPrepayment_9F3E3F036BC6F0923584D3C1847A6BCC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Required Prepayment </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_DebtInstrumentRequiredPrepayment" xlink:label="loc_ara_DebtInstrumentRequiredPrepayment_9F3E3F036BC6F0923584D3C1847A6BCC" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_DebtInstrumentRequiredPrepayment_9F3E3F036BC6F0923584D3C1847A6BCC" xlink:to="lab_ara_DebtInstrumentRequiredPrepayment_9F3E3F036BC6F0923584D3C1847A6BCC" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentPeriodicPayment_CD96EA071BFA9CAC501BD3C1847AC919_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentPeriodicPayment_CD96EA071BFA9CAC501BD3C1847AC919" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Quarterly installment payment </link:label>
<link:label id="lab_us-gaap_DebtInstrumentPeriodicPayment_CD96EA071BFA9CAC501BD3C1847AC919_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentPeriodicPayment_CD96EA071BFA9CAC501BD3C1847AC919" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Periodic Payment </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentPeriodicPayment" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPayment_CD96EA071BFA9CAC501BD3C1847AC919" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentPeriodicPayment_CD96EA071BFA9CAC501BD3C1847AC919" xlink:to="lab_us-gaap_DebtInstrumentPeriodicPayment_CD96EA071BFA9CAC501BD3C1847AC919" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_0972813E122673F82522D3C1847A928B_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_0972813E122673F82522D3C1847A928B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Revolving credit facility commitment fee as a percentage </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_0972813E122673F82522D3C1847A928B_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_0972813E122673F82522D3C1847A928B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Commitment Fee Percentage </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_0972813E122673F82522D3C1847A928B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_0972813E122673F82522D3C1847A928B" xlink:to="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_0972813E122673F82522D3C1847A928B" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_5EFCC1AB8552E7853587D3C1847AD429_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_5EFCC1AB8552E7853587D3C1847AD429" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate at period end </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_5EFCC1AB8552E7853587D3C1847AD429_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_5EFCC1AB8552E7853587D3C1847AD429" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Interest Rate at Period End </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_5EFCC1AB8552E7853587D3C1847AD429" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_5EFCC1AB8552E7853587D3C1847AD429" xlink:to="lab_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_5EFCC1AB8552E7853587D3C1847AD429" xlink:type="arc"/>
<link:label id="lab_invest_DerivativeNotionalAmount_181BB10A8C57A5DEDED6D3C1847AEE15_terseLabel_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_181BB10A8C57A5DEDED6D3C1847AEE15" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate swap agreements notional amount </link:label>
<link:label id="lab_invest_DerivativeNotionalAmount_181BB10A8C57A5DEDED6D3C1847AEE15_label_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_181BB10A8C57A5DEDED6D3C1847AEE15" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Derivative, Notional Amount </link:label>
<link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_181BB10A8C57A5DEDED6D3C1847AEE15" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_DerivativeNotionalAmount_181BB10A8C57A5DEDED6D3C1847AEE15" xlink:to="lab_invest_DerivativeNotionalAmount_181BB10A8C57A5DEDED6D3C1847AEE15" xlink:type="arc"/>
<link:label id="lab_us-gaap_DerivativeNumberOfInstrumentsHeld_8845A51A257009D2C12FD3C1847B1215_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeNumberOfInstrumentsHeld_8845A51A257009D2C12FD3C1847B1215" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of interest rate swap agreements </link:label>
<link:label id="lab_us-gaap_DerivativeNumberOfInstrumentsHeld_8845A51A257009D2C12FD3C1847B1215_label_en-US" xlink:label="lab_us-gaap_DerivativeNumberOfInstrumentsHeld_8845A51A257009D2C12FD3C1847B1215" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Derivative, Number of Instruments Held </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeNumberOfInstrumentsHeld" xlink:label="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_8845A51A257009D2C12FD3C1847B1215" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_8845A51A257009D2C12FD3C1847B1215" xlink:to="lab_us-gaap_DerivativeNumberOfInstrumentsHeld_8845A51A257009D2C12FD3C1847B1215" xlink:type="arc"/>
<link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_7DBEB919A808DC26EAD1D3C1847B3377_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_7DBEB919A808DC26EAD1D3C1847B3377" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Unrealized pre-tax (gain) loss of the Swaps </link:label>
<link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_7DBEB919A808DC26EAD1D3C1847B3377_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_7DBEB919A808DC26EAD1D3C1847B3377" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_7DBEB919A808DC26EAD1D3C1847B3377" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_7DBEB919A808DC26EAD1D3C1847B3377" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_7DBEB919A808DC26EAD1D3C1847B3377" xlink:type="arc"/>
<link:label id="lab_ara_DebtInstrumentDebtDefaultFeeAmount_54E9A9F3D683D1A4F29ED3C1847B5EBF_terseLabel_en-US" xlink:label="lab_ara_DebtInstrumentDebtDefaultFeeAmount_54E9A9F3D683D1A4F29ED3C1847B5EBF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Fees related to debt amendment </link:label>
<link:label id="lab_ara_DebtInstrumentDebtDefaultFeeAmount_54E9A9F3D683D1A4F29ED3C1847B5EBF_label_en-US" xlink:label="lab_ara_DebtInstrumentDebtDefaultFeeAmount_54E9A9F3D683D1A4F29ED3C1847B5EBF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Debt Default, Fee Amount </link:label>
<link:label id="lab_ara_DebtInstrumentDebtDefaultFeeAmount_54E9A9F3D683D1A4F29ED3C1847B5EBF_documentation_en-US" xlink:label="lab_ara_DebtInstrumentDebtDefaultFeeAmount_54E9A9F3D683D1A4F29ED3C1847B5EBF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Debt Default, Fee Amount </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_DebtInstrumentDebtDefaultFeeAmount" xlink:label="loc_ara_DebtInstrumentDebtDefaultFeeAmount_54E9A9F3D683D1A4F29ED3C1847B5EBF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_DebtInstrumentDebtDefaultFeeAmount_54E9A9F3D683D1A4F29ED3C1847B5EBF" xlink:to="lab_ara_DebtInstrumentDebtDefaultFeeAmount_54E9A9F3D683D1A4F29ED3C1847B5EBF" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_9260E0F27417C8059404D3C1847BFD8F_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_9260E0F27417C8059404D3C1847BFD8F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Debt redemption price, percentage </link:label>
<link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_9260E0F27417C8059404D3C1847BFD8F_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_9260E0F27417C8059404D3C1847BFD8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Redemption Price, Percentage </link:label>
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<link:label id="lab_ara_DebtInstrumentCovenantMaximumCashAndCashEquivalentForDebtIssuance_DC5AF325254D51EA598ED3C1847B4A62_label_en-US" xlink:label="lab_ara_DebtInstrumentCovenantMaximumCashAndCashEquivalentForDebtIssuance_DC5AF325254D51EA598ED3C1847B4A62" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant, Maximum Cash And Cash Equivalent For Debt Issuance </link:label>
<link:label id="lab_ara_DebtInstrumentCovenantMaximumCashAndCashEquivalentForDebtIssuance_DC5AF325254D51EA598ED3C1847B4A62_documentation_en-US" xlink:label="lab_ara_DebtInstrumentCovenantMaximumCashAndCashEquivalentForDebtIssuance_DC5AF325254D51EA598ED3C1847B4A62" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant, Maximum Cash And Cash Equivalent For Debt Issuance </link:label>
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<link:label id="lab_ara_DebtInstrumentCovenantNetLeverageRatioMaximum_095969DDCB1EEE93373AD3C1847CF1AE_label_en-US" xlink:label="lab_ara_DebtInstrumentCovenantNetLeverageRatioMaximum_095969DDCB1EEE93373AD3C1847CF1AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant, Net Leverage Ratio, Maximum </link:label>
<link:label id="lab_ara_DebtInstrumentCovenantNetLeverageRatioMaximum_095969DDCB1EEE93373AD3C1847CF1AE_documentation_en-US" xlink:label="lab_ara_DebtInstrumentCovenantNetLeverageRatioMaximum_095969DDCB1EEE93373AD3C1847CF1AE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Covenant, Net Leverage Ratio, Maximum </link:label>
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<link:label id="lab_us-gaap_LongTermDebtNoncurrent_8D2A9A4C7E8B336D21B1D3C1847CE498_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent_8D2A9A4C7E8B336D21B1D3C1847CE498" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Long-term debt excluding current maturities </link:label>
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<link:label id="lab_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_E1E76B3D643D8DD40B55958D84247A22_terseLabel_en-US" xlink:label="lab_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_E1E76B3D643D8DD40B55958D84247A22" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] </link:label>
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<link:label id="lab_us-gaap_UnrecognizedTaxBenefits_201C6958D0DFDE1F1227958D8424DD44_label_en-US" xlink:label="lab_us-gaap_UnrecognizedTaxBenefits_201C6958D0DFDE1F1227958D8424DD44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Unrecognized Tax Benefits </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions_CBDFED86604819EB9419958D8424787A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_B04D3C5257E34D6B4310958D84F6D4A3_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_B04D3C5257E34D6B4310958D84F6D4A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of the fair value of financial instruments </link:label>
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<link:label id="lab_us-gaap_RestrictedCash_9020CCF06E9A40926CB7958D8525A345_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCash_9020CCF06E9A40926CB7958D8525A345" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Restricted cash included in other long-term assets </link:label>
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<link:label id="lab_us-gaap_LongtermPurchaseCommitmentPeriod_ED968732413CC24F0450958D83C7BB36_label_en-US" xlink:label="lab_us-gaap_LongtermPurchaseCommitmentPeriod_ED968732413CC24F0450958D83C7BB36" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Purchase Commitment, Period </link:label>
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<link:label id="lab_ara_PercentageTaxSavingsPayableToStockholders_DDEDBE54AA1A252A9780958D83C7EF8D_label_en-US" xlink:label="lab_ara_PercentageTaxSavingsPayableToStockholders_DDEDBE54AA1A252A9780958D83C7EF8D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Percentage Tax Savings Payable To Stockholders </link:label>
<link:label id="lab_ara_PercentageTaxSavingsPayableToStockholders_DDEDBE54AA1A252A9780958D83C7EF8D_documentation_en-US" xlink:label="lab_ara_PercentageTaxSavingsPayableToStockholders_DDEDBE54AA1A252A9780958D83C7EF8D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> The percentage of cash savings in U.S. federal, state and local income tax realized as a result of any deductions (including net operating losses resulting from such deductions) attributable to the exercise of (or any payment, including any dividend equivalent right or payment, in respect of) any compensatory stock option issued payable to our pre-IPO stockholders on a pro rata basis. </link:label>
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<link:label id="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_B5E1C48968757C57CA8F958D85ACE151_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_B5E1C48968757C57CA8F958D85ACE151" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party [Axis] </link:label>
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<link:label id="lab_us-gaap_RelatedPartyDomain_223329721EC840BE5D2B958D85AC8289_label_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain_223329721EC840BE5D2B958D85AC8289" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party [Domain] </link:label>
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<link:label id="lab_ara_NumberOfDialysisClinicsOwnedAndOperated_EBF854B56659E5A91BF5958D85AC321C_terseLabel_en-US" xlink:label="lab_ara_NumberOfDialysisClinicsOwnedAndOperated_EBF854B56659E5A91BF5958D85AC321C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of dialysis clinics owned and operated </link:label>
<link:label id="lab_ara_NumberOfDialysisClinicsOwnedAndOperated_EBF854B56659E5A91BF5958D85AC321C_label_en-US" xlink:label="lab_ara_NumberOfDialysisClinicsOwnedAndOperated_EBF854B56659E5A91BF5958D85AC321C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Number of Dialysis Clinics Owned and Operated </link:label>
<link:label id="lab_ara_NumberOfDialysisClinicsOwnedAndOperated_EBF854B56659E5A91BF5958D85AC321C_documentation_en-US" xlink:label="lab_ara_NumberOfDialysisClinicsOwnedAndOperated_EBF854B56659E5A91BF5958D85AC321C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Number of dialysis clinics owned and operated by the company. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_NumberOfDialysisClinicsOwnedAndOperated" xlink:label="loc_ara_NumberOfDialysisClinicsOwnedAndOperated_EBF854B56659E5A91BF5958D85AC321C" xlink:type="locator"/>
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<link:label id="lab_ara_NumberOfPatients_CA1F25FDADC81FC98F5C958D85ACB2EB_terseLabel_en-US" xlink:label="lab_ara_NumberOfPatients_CA1F25FDADC81FC98F5C958D85ACB2EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of patients </link:label>
<link:label id="lab_ara_NumberOfPatients_CA1F25FDADC81FC98F5C958D85ACB2EB_label_en-US" xlink:label="lab_ara_NumberOfPatients_CA1F25FDADC81FC98F5C958D85ACB2EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Number of Patients </link:label>
<link:label id="lab_ara_NumberOfPatients_CA1F25FDADC81FC98F5C958D85ACB2EB_documentation_en-US" xlink:label="lab_ara_NumberOfPatients_CA1F25FDADC81FC98F5C958D85ACB2EB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Number of patients treated. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_NumberOfPatients" xlink:label="loc_ara_NumberOfPatients_CA1F25FDADC81FC98F5C958D85ACB2EB" xlink:type="locator"/>
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<link:label id="lab_us-gaap_NumberOfStatesInWhichEntityOperates_03BA05E997DA9EF28593958D85ACFB26_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfStatesInWhichEntityOperates_03BA05E997DA9EF28593958D85ACFB26" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of states </link:label>
<link:label id="lab_us-gaap_NumberOfStatesInWhichEntityOperates_03BA05E997DA9EF28593958D85ACFB26_label_en-US" xlink:label="lab_us-gaap_NumberOfStatesInWhichEntityOperates_03BA05E997DA9EF28593958D85ACFB26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Number of States in which Entity Operates </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfStatesInWhichEntityOperates" xlink:label="loc_us-gaap_NumberOfStatesInWhichEntityOperates_03BA05E997DA9EF28593958D85ACFB26" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DebtDisclosureAbstract_308FCF718738159FB701958D8492B53A_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureAbstract_308FCF718738159FB701958D8492B53A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Disclosure [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_308FCF718738159FB701958D8492B53A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_91438A932E8C07083182958D8493DCEC_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_91438A932E8C07083182958D8493DCEC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> 2019 </link:label>
<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_91438A932E8C07083182958D8493DCEC_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_91438A932E8C07083182958D8493DCEC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_91438A932E8C07083182958D8493DCEC" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_F3FA5E5C5412BFEDB32D958D849332A2_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_F3FA5E5C5412BFEDB32D958D849332A2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_F3FA5E5C5412BFEDB32D958D849332A2_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_F3FA5E5C5412BFEDB32D958D849332A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Year Two </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_F3FA5E5C5412BFEDB32D958D849332A2" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_F3FA5E5C5412BFEDB32D958D849332A2" xlink:to="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_F3FA5E5C5412BFEDB32D958D849332A2" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_7611639B6FAE33EF042C958D84930D72_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_7611639B6FAE33EF042C958D84930D72" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_7611639B6FAE33EF042C958D84930D72_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_7611639B6FAE33EF042C958D84930D72" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Year Three </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_7611639B6FAE33EF042C958D84930D72" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_7611639B6FAE33EF042C958D84930D72" xlink:to="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_7611639B6FAE33EF042C958D84930D72" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_98F06F64A99404002105958D84932A09_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_98F06F64A99404002105958D84932A09" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_98F06F64A99404002105958D84932A09_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_98F06F64A99404002105958D84932A09" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Year Four </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_98F06F64A99404002105958D84932A09" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_98F06F64A99404002105958D84932A09" xlink:to="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_98F06F64A99404002105958D84932A09" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_0823C74CF7E6A4A68E9F958D8494945C_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_0823C74CF7E6A4A68E9F958D8494945C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2023 </link:label>
<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_0823C74CF7E6A4A68E9F958D8494945C_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_0823C74CF7E6A4A68E9F958D8494945C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Year Five </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_0823C74CF7E6A4A68E9F958D8494945C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_11BD9146C32091174589958D849440B9_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_11BD9146C32091174589958D849440B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Thereafter </link:label>
<link:label id="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_11BD9146C32091174589958D849440B9_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_11BD9146C32091174589958D849440B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal after Year Five </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_11BD9146C32091174589958D849440B9" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LongTermDebt_40274150255541442375958D84940D35_totalLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt_40274150255541442375958D84940D35" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total long-term debt </link:label>
<link:label id="lab_us-gaap_LongTermDebt_40274150255541442375958D84940D35_label_en-US" xlink:label="lab_us-gaap_LongTermDebt_40274150255541442375958D84940D35" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_40274150255541442375958D84940D35" xlink:type="locator"/>
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<link:label id="lab_us-gaap_RelatedPartyTransactionsAbstract_5A2F134B60867AC4E985958D83D66E7C_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsAbstract_5A2F134B60867AC4E985958D83D66E7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party Transactions [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract_5A2F134B60867AC4E985958D83D66E7C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6A8CAE1BC1016A34DEF6958D83D6DC79_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6A8CAE1BC1016A34DEF6958D83D6DC79" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Related Party Transactions, by Related Party [Table] </link:label>
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<link:label id="lab_ara_KineticMember_7D6FD49AE92E6693F840958D83D684E4_terseLabel_en-US" xlink:label="lab_ara_KineticMember_7D6FD49AE92E6693F840958D83D684E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Kinetic </link:label>
<link:label id="lab_ara_KineticMember_7D6FD49AE92E6693F840958D83D684E4_label_en-US" xlink:label="lab_ara_KineticMember_7D6FD49AE92E6693F840958D83D684E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Kinetic [Member] </link:label>
<link:label id="lab_ara_KineticMember_7D6FD49AE92E6693F840958D83D684E4_documentation_en-US" xlink:label="lab_ara_KineticMember_7D6FD49AE92E6693F840958D83D684E4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Kinetic [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_KineticMember" xlink:label="loc_ara_KineticMember_7D6FD49AE92E6693F840958D83D684E4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_KineticMember_7D6FD49AE92E6693F840958D83D684E4" xlink:to="lab_ara_KineticMember_7D6FD49AE92E6693F840958D83D684E4" xlink:type="arc"/>
<link:label id="lab_srt_ExecutiveOfficerMember_35AD17A1E82E1868729B958D83D63145_terseLabel_en-US" xlink:label="lab_srt_ExecutiveOfficerMember_35AD17A1E82E1868729B958D83D63145" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Executive </link:label>
<link:label id="lab_srt_ExecutiveOfficerMember_35AD17A1E82E1868729B958D83D63145_label_en-US" xlink:label="lab_srt_ExecutiveOfficerMember_35AD17A1E82E1868729B958D83D63145" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Executive Officer [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ExecutiveOfficerMember" xlink:label="loc_srt_ExecutiveOfficerMember_35AD17A1E82E1868729B958D83D63145" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ExecutiveOfficerMember_35AD17A1E82E1868729B958D83D63145" xlink:to="lab_srt_ExecutiveOfficerMember_35AD17A1E82E1868729B958D83D63145" xlink:type="arc"/>
<link:label id="lab_us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_FD000DE6BCD2F71274A6958D83D644B8_terseLabel_en-US" xlink:label="lab_us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_FD000DE6BCD2F71274A6958D83D644B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Spouse of executive </link:label>
<link:label id="lab_us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_FD000DE6BCD2F71274A6958D83D644B8_label_en-US" xlink:label="lab_us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_FD000DE6BCD2F71274A6958D83D644B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Immediate Family Member of Management or Principal Owner [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember" xlink:label="loc_us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_FD000DE6BCD2F71274A6958D83D644B8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_FD000DE6BCD2F71274A6958D83D644B8" xlink:to="lab_us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember_FD000DE6BCD2F71274A6958D83D644B8" xlink:type="arc"/>
<link:label id="lab_srt_AffiliatedEntityMember_CC3FD439EBE8B28764BF958D83D6173E_terseLabel_en-US" xlink:label="lab_srt_AffiliatedEntityMember_CC3FD439EBE8B28764BF958D83D6173E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Affiliated entity </link:label>
<link:label id="lab_srt_AffiliatedEntityMember_CC3FD439EBE8B28764BF958D83D6173E_label_en-US" xlink:label="lab_srt_AffiliatedEntityMember_CC3FD439EBE8B28764BF958D83D6173E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Affiliated Entity [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AffiliatedEntityMember" xlink:label="loc_srt_AffiliatedEntityMember_CC3FD439EBE8B28764BF958D83D6173E" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_AffiliatedEntityMember_CC3FD439EBE8B28764BF958D83D6173E" xlink:to="lab_srt_AffiliatedEntityMember_CC3FD439EBE8B28764BF958D83D6173E" xlink:type="arc"/>
<link:label id="lab_us-gaap_RelatedPartyTransactionAxis_E0603878920611A93087958D83D62F01_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAxis_E0603878920611A93087958D83D62F01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Related Party Transaction [Axis] </link:label>
<link:label id="lab_us-gaap_RelatedPartyTransactionAxis_E0603878920611A93087958D83D62F01_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAxis_E0603878920611A93087958D83D62F01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party Transaction [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_E0603878920611A93087958D83D62F01" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_E0603878920611A93087958D83D62F01" xlink:to="lab_us-gaap_RelatedPartyTransactionAxis_E0603878920611A93087958D83D62F01" xlink:type="arc"/>
<link:label id="lab_us-gaap_RelatedPartyTransactionDomain_B4E3E0454685F1BEE6FF958D83D6CC74_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionDomain_B4E3E0454685F1BEE6FF958D83D6CC74" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Related Party Transaction [Domain] </link:label>
<link:label id="lab_us-gaap_RelatedPartyTransactionDomain_B4E3E0454685F1BEE6FF958D83D6CC74_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionDomain_B4E3E0454685F1BEE6FF958D83D6CC74" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party Transaction [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_B4E3E0454685F1BEE6FF958D83D6CC74" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_B4E3E0454685F1BEE6FF958D83D6CC74" xlink:to="lab_us-gaap_RelatedPartyTransactionDomain_B4E3E0454685F1BEE6FF958D83D6CC74" xlink:type="arc"/>
<link:label id="lab_ara_SubleaseAgreementMember_A2794DDAA94971939445958D83D6880D_terseLabel_en-US" xlink:label="lab_ara_SubleaseAgreementMember_A2794DDAA94971939445958D83D6880D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Sublease agreement </link:label>
<link:label id="lab_ara_SubleaseAgreementMember_A2794DDAA94971939445958D83D6880D_label_en-US" xlink:label="lab_ara_SubleaseAgreementMember_A2794DDAA94971939445958D83D6880D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Sublease Agreement [Member] </link:label>
<link:label id="lab_ara_SubleaseAgreementMember_A2794DDAA94971939445958D83D6880D_documentation_en-US" xlink:label="lab_ara_SubleaseAgreementMember_A2794DDAA94971939445958D83D6880D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents the information pertaining to Sub lease agreement. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_SubleaseAgreementMember" xlink:label="loc_ara_SubleaseAgreementMember_A2794DDAA94971939445958D83D6880D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_SubleaseAgreementMember_A2794DDAA94971939445958D83D6880D" xlink:to="lab_ara_SubleaseAgreementMember_A2794DDAA94971939445958D83D6880D" xlink:type="arc"/>
<link:label id="lab_ara_SoftwareServicesAgreementMember_C3188D8E415093E9354C958D83D61D70_terseLabel_en-US" xlink:label="lab_ara_SoftwareServicesAgreementMember_C3188D8E415093E9354C958D83D61D70" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Software services agreement </link:label>
<link:label id="lab_ara_SoftwareServicesAgreementMember_C3188D8E415093E9354C958D83D61D70_label_en-US" xlink:label="lab_ara_SoftwareServicesAgreementMember_C3188D8E415093E9354C958D83D61D70" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Software Services Agreement [Member] </link:label>
<link:label id="lab_ara_SoftwareServicesAgreementMember_C3188D8E415093E9354C958D83D61D70_documentation_en-US" xlink:label="lab_ara_SoftwareServicesAgreementMember_C3188D8E415093E9354C958D83D61D70" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Software Services Agreement [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_SoftwareServicesAgreementMember" xlink:label="loc_ara_SoftwareServicesAgreementMember_C3188D8E415093E9354C958D83D61D70" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_SoftwareServicesAgreementMember_C3188D8E415093E9354C958D83D61D70" xlink:to="lab_ara_SoftwareServicesAgreementMember_C3188D8E415093E9354C958D83D61D70" xlink:type="arc"/>
<link:label id="lab_ara_FinancingTransactionsMember_E36DEE96B2AD90953FFC958D83D69514_terseLabel_en-US" xlink:label="lab_ara_FinancingTransactionsMember_E36DEE96B2AD90953FFC958D83D69514" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Financing Transactions </link:label>
<link:label id="lab_ara_FinancingTransactionsMember_E36DEE96B2AD90953FFC958D83D69514_label_en-US" xlink:label="lab_ara_FinancingTransactionsMember_E36DEE96B2AD90953FFC958D83D69514" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Financing Transactions [Member] </link:label>
<link:label id="lab_ara_FinancingTransactionsMember_E36DEE96B2AD90953FFC958D83D69514_documentation_en-US" xlink:label="lab_ara_FinancingTransactionsMember_E36DEE96B2AD90953FFC958D83D69514" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Financing Transactions [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_FinancingTransactionsMember" xlink:label="loc_ara_FinancingTransactionsMember_E36DEE96B2AD90953FFC958D83D69514" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_FinancingTransactionsMember_E36DEE96B2AD90953FFC958D83D69514" xlink:to="lab_ara_FinancingTransactionsMember_E36DEE96B2AD90953FFC958D83D69514" xlink:type="arc"/>
<link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_5CF4BA1D857A0076105B958D83D6A471_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems_5CF4BA1D857A0076105B958D83D6A471" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> RELATED PARTY TRANSACTIONS </link:label>
<link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_5CF4BA1D857A0076105B958D83D6A471_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems_5CF4BA1D857A0076105B958D83D6A471" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party Transaction [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_5CF4BA1D857A0076105B958D83D6A471" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_5CF4BA1D857A0076105B958D83D6A471" xlink:to="lab_us-gaap_RelatedPartyTransactionLineItems_5CF4BA1D857A0076105B958D83D6A471" xlink:type="arc"/>
<link:label id="lab_us-gaap_NotesReceivableRelatedPartiesCurrent_B94278B7095A23193937958D83D623C6_verboseLabel_en-US" xlink:label="lab_us-gaap_NotesReceivableRelatedPartiesCurrent_B94278B7095A23193937958D83D623C6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Total amount of initial financing </link:label>
<link:label id="lab_us-gaap_NotesReceivableRelatedPartiesCurrent_B94278B7095A23193937958D83D623C6_label_en-US" xlink:label="lab_us-gaap_NotesReceivableRelatedPartiesCurrent_B94278B7095A23193937958D83D623C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Notes Receivable, Related Parties, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NotesReceivableRelatedPartiesCurrent" xlink:label="loc_us-gaap_NotesReceivableRelatedPartiesCurrent_B94278B7095A23193937958D83D623C6" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NotesReceivableRelatedPartiesCurrent_B94278B7095A23193937958D83D623C6" xlink:to="lab_us-gaap_NotesReceivableRelatedPartiesCurrent_B94278B7095A23193937958D83D623C6" xlink:type="arc"/>
<link:label id="lab_us-gaap_DueFromRelatedPartiesCurrent_9E77C4B5CDEB1AAEF4E3958D83D60446_terseLabel_en-US" xlink:label="lab_us-gaap_DueFromRelatedPartiesCurrent_9E77C4B5CDEB1AAEF4E3958D83D60446" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amount outstanding </link:label>
<link:label id="lab_us-gaap_DueFromRelatedPartiesCurrent_9E77C4B5CDEB1AAEF4E3958D83D60446_label_en-US" xlink:label="lab_us-gaap_DueFromRelatedPartiesCurrent_9E77C4B5CDEB1AAEF4E3958D83D60446" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Due from Related Parties, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DueFromRelatedPartiesCurrent" xlink:label="loc_us-gaap_DueFromRelatedPartiesCurrent_9E77C4B5CDEB1AAEF4E3958D83D60446" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DueFromRelatedPartiesCurrent_9E77C4B5CDEB1AAEF4E3958D83D60446" xlink:to="lab_us-gaap_DueFromRelatedPartiesCurrent_9E77C4B5CDEB1AAEF4E3958D83D60446" xlink:type="arc"/>
<link:label id="lab_ara_OwnershipPercentage_137A733789D9F5DA1287958D83D664DF_terseLabel_en-US" xlink:label="lab_ara_OwnershipPercentage_137A733789D9F5DA1287958D83D664DF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Ownership percentage </link:label>
<link:label id="lab_ara_OwnershipPercentage_137A733789D9F5DA1287958D83D664DF_label_en-US" xlink:label="lab_ara_OwnershipPercentage_137A733789D9F5DA1287958D83D664DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Ownership Percentage </link:label>
<link:label id="lab_ara_OwnershipPercentage_137A733789D9F5DA1287958D83D664DF_documentation_en-US" xlink:label="lab_ara_OwnershipPercentage_137A733789D9F5DA1287958D83D664DF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Ownership Percentage </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OwnershipPercentage" xlink:label="loc_ara_OwnershipPercentage_137A733789D9F5DA1287958D83D664DF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OwnershipPercentage_137A733789D9F5DA1287958D83D664DF" xlink:to="lab_ara_OwnershipPercentage_137A733789D9F5DA1287958D83D664DF" xlink:type="arc"/>
<link:label id="lab_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_23B99EA624C70D92DFD3958D83D6DE85_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_23B99EA624C70D92DFD3958D83D6DE85" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Expense related to agreement </link:label>
<link:label id="lab_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_23B99EA624C70D92DFD3958D83D6DE85_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_23B99EA624C70D92DFD3958D83D6DE85" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party Transaction, Expenses from Transactions with Related Party </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:label="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_23B99EA624C70D92DFD3958D83D6DE85" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_23B99EA624C70D92DFD3958D83D6DE85" xlink:to="lab_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_23B99EA624C70D92DFD3958D83D6DE85" xlink:type="arc"/>
<link:label id="lab_ara_OwnershipInterestInJointVenture_978E2C822433843D5B8A958D83D68B5C_terseLabel_en-US" xlink:label="lab_ara_OwnershipInterestInJointVenture_978E2C822433843D5B8A958D83D68B5C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Principal loan outstanding amount on joint venture </link:label>
<link:label id="lab_ara_OwnershipInterestInJointVenture_978E2C822433843D5B8A958D83D68B5C_label_en-US" xlink:label="lab_ara_OwnershipInterestInJointVenture_978E2C822433843D5B8A958D83D68B5C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Ownership Interest In Joint Venture </link:label>
<link:label id="lab_ara_OwnershipInterestInJointVenture_978E2C822433843D5B8A958D83D68B5C_documentation_en-US" xlink:label="lab_ara_OwnershipInterestInJointVenture_978E2C822433843D5B8A958D83D68B5C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Ownership Interest In Joint Venture </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OwnershipInterestInJointVenture" xlink:label="loc_ara_OwnershipInterestInJointVenture_978E2C822433843D5B8A958D83D68B5C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OwnershipInterestInJointVenture_978E2C822433843D5B8A958D83D68B5C" xlink:to="lab_ara_OwnershipInterestInJointVenture_978E2C822433843D5B8A958D83D68B5C" xlink:type="arc"/>
<link:label id="lab_ara_PeriodOfWeightedAverageMaturity_0D05F6E62E6AAB40F7B1958D83D6CFD0_terseLabel_en-US" xlink:label="lab_ara_PeriodOfWeightedAverageMaturity_0D05F6E62E6AAB40F7B1958D83D6CFD0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Period of weighted average maturity, clinic loans </link:label>
<link:label id="lab_ara_PeriodOfWeightedAverageMaturity_0D05F6E62E6AAB40F7B1958D83D6CFD0_label_en-US" xlink:label="lab_ara_PeriodOfWeightedAverageMaturity_0D05F6E62E6AAB40F7B1958D83D6CFD0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Period Of Weighted Average Maturity </link:label>
<link:label id="lab_ara_PeriodOfWeightedAverageMaturity_0D05F6E62E6AAB40F7B1958D83D6CFD0_documentation_en-US" xlink:label="lab_ara_PeriodOfWeightedAverageMaturity_0D05F6E62E6AAB40F7B1958D83D6CFD0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Weighted average maturity (weighted by amount of the agreement), in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_PeriodOfWeightedAverageMaturity" xlink:label="loc_ara_PeriodOfWeightedAverageMaturity_0D05F6E62E6AAB40F7B1958D83D6CFD0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_PeriodOfWeightedAverageMaturity_0D05F6E62E6AAB40F7B1958D83D6CFD0" xlink:to="lab_ara_PeriodOfWeightedAverageMaturity_0D05F6E62E6AAB40F7B1958D83D6CFD0" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtWeightedAverageInterestRate_6E745721C08830BFCAB1958D83D6A4FD_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtWeightedAverageInterestRate_6E745721C08830BFCAB1958D83D6A4FD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Weighted average interest rate, clinic loans </link:label>
<link:label id="lab_us-gaap_DebtWeightedAverageInterestRate_6E745721C08830BFCAB1958D83D6A4FD_label_en-US" xlink:label="lab_us-gaap_DebtWeightedAverageInterestRate_6E745721C08830BFCAB1958D83D6A4FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt, Weighted Average Interest Rate </link:label>
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<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtWeightedAverageInterestRate_6E745721C08830BFCAB1958D83D6A4FD" xlink:to="lab_us-gaap_DebtWeightedAverageInterestRate_6E745721C08830BFCAB1958D83D6A4FD" xlink:type="arc"/>
<link:label id="lab_ara_RelatedPartyTransactionLoanGuarantee_B60AEF64636B6F19C55F958D83D658FE_terseLabel_en-US" xlink:label="lab_ara_RelatedPartyTransactionLoanGuarantee_B60AEF64636B6F19C55F958D83D658FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Loan guarantee </link:label>
<link:label id="lab_ara_RelatedPartyTransactionLoanGuarantee_B60AEF64636B6F19C55F958D83D658FE_label_en-US" xlink:label="lab_ara_RelatedPartyTransactionLoanGuarantee_B60AEF64636B6F19C55F958D83D658FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Related Party Transaction, Loan Guarantee </link:label>
<link:label id="lab_ara_RelatedPartyTransactionLoanGuarantee_B60AEF64636B6F19C55F958D83D658FE_documentation_en-US" xlink:label="lab_ara_RelatedPartyTransactionLoanGuarantee_B60AEF64636B6F19C55F958D83D658FE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Related Party Transaction, Loan Guarantee </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_RelatedPartyTransactionLoanGuarantee" xlink:label="loc_ara_RelatedPartyTransactionLoanGuarantee_B60AEF64636B6F19C55F958D83D658FE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_RelatedPartyTransactionLoanGuarantee_B60AEF64636B6F19C55F958D83D658FE" xlink:to="lab_ara_RelatedPartyTransactionLoanGuarantee_B60AEF64636B6F19C55F958D83D658FE" xlink:type="arc"/>
<link:label id="lab_ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_0826A49343E144194350958D859C0F84_terseLabel_en-US" xlink:label="lab_ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_0826A49343E144194350958D859C0F84" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of property, plant and equipment </link:label>
<link:label id="lab_ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_0826A49343E144194350958D859C0F84_label_en-US" xlink:label="lab_ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_0826A49343E144194350958D859C0F84" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Property, Plant and Equipment, Useful Life [Table Text Block] </link:label>
<link:label id="lab_ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_0826A49343E144194350958D859C0F84_documentation_en-US" xlink:label="lab_ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_0826A49343E144194350958D859C0F84" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Tabular disclosure of the useful life of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock" xlink:label="loc_ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_0826A49343E144194350958D859C0F84" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_0826A49343E144194350958D859C0F84" xlink:to="lab_ara_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock_0826A49343E144194350958D859C0F84" xlink:type="arc"/>
<link:label id="lab_us-gaap_ScheduleOfRevenueSourcesHealthCareOrganizationTableTextBlock_C659E1C607BFB547494D958D859C882C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRevenueSourcesHealthCareOrganizationTableTextBlock_C659E1C607BFB547494D958D859C882C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Patient care service revenue by source </link:label>
<link:label id="lab_us-gaap_ScheduleOfRevenueSourcesHealthCareOrganizationTableTextBlock_C659E1C607BFB547494D958D859C882C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRevenueSourcesHealthCareOrganizationTableTextBlock_C659E1C607BFB547494D958D859C882C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Revenue Sources, Health Care Organization [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRevenueSourcesHealthCareOrganizationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenueSourcesHealthCareOrganizationTableTextBlock_C659E1C607BFB547494D958D859C882C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_SubsequentEventsTextBlock_CE6295EF96B1AC97BABD958D8355E1EE_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventsTextBlock_CE6295EF96B1AC97BABD958D8355E1EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Subsequent Events </link:label>
<link:label id="lab_us-gaap_SubsequentEventsTextBlock_CE6295EF96B1AC97BABD958D8355E1EE_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsTextBlock_CE6295EF96B1AC97BABD958D8355E1EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Subsequent Events [Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_CE6295EF96B1AC97BABD958D8355E1EE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsTextBlock_CE6295EF96B1AC97BABD958D8355E1EE" xlink:to="lab_us-gaap_SubsequentEventsTextBlock_CE6295EF96B1AC97BABD958D8355E1EE" xlink:type="arc"/>
<link:label id="lab_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_AC2143BEACB3119FDE96958D8415EA14_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_AC2143BEACB3119FDE96958D8415EA14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of stock-based compensation expense </link:label>
<link:label id="lab_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_AC2143BEACB3119FDE96958D8415EA14_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_AC2143BEACB3119FDE96958D8415EA14" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_AC2143BEACB3119FDE96958D8415EA14" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_AC2143BEACB3119FDE96958D8415EA14" xlink:to="lab_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_AC2143BEACB3119FDE96958D8415EA14" xlink:type="arc"/>
<link:label id="lab_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_95D5AF5D8BBB58D147D9958D841510D0_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_95D5AF5D8BBB58D147D9958D841510D0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of assumptions used for options granted to acquire Common Stock and the fair value at the date of grant </link:label>
<link:label id="lab_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_95D5AF5D8BBB58D147D9958D841510D0_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_95D5AF5D8BBB58D147D9958D841510D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_95D5AF5D8BBB58D147D9958D841510D0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_95D5AF5D8BBB58D147D9958D841510D0" xlink:to="lab_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_95D5AF5D8BBB58D147D9958D841510D0" xlink:type="arc"/>
<link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock_E14A33A2EBF5307E58F7958D841543FE_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock_E14A33A2EBF5307E58F7958D841543FE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of information concerning options activity for options to acquire Common Stock </link:label>
<link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock_E14A33A2EBF5307E58F7958D841543FE_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock_E14A33A2EBF5307E58F7958D841543FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock_E14A33A2EBF5307E58F7958D841543FE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock_E14A33A2EBF5307E58F7958D841543FE" xlink:to="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTableTextBlock_E14A33A2EBF5307E58F7958D841543FE" xlink:type="arc"/>
<link:label id="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_04385BB370622652FCC7958D8415EFE4_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_04385BB370622652FCC7958D8415EFE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of restricted stock award activity </link:label>
<link:label id="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_04385BB370622652FCC7958D8415EFE4_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_04385BB370622652FCC7958D8415EFE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_04385BB370622652FCC7958D8415EFE4" xlink:type="locator"/>
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<link:label id="lab_us-gaap_RestrictedStockMember_F81A2E2399CFE5FE2608958D83D6838C_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedStockMember_F81A2E2399CFE5FE2608958D83D6838C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Restricted stock </link:label>
<link:label id="lab_us-gaap_RestrictedStockMember_F81A2E2399CFE5FE2608958D83D6838C_label_en-US" xlink:label="lab_us-gaap_RestrictedStockMember_F81A2E2399CFE5FE2608958D83D6838C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Restricted Stock [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="loc_us-gaap_RestrictedStockMember_F81A2E2399CFE5FE2608958D83D6838C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F231DB5541E01DC81864958D83E6B5C4_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F231DB5541E01DC81864958D83E6B5C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of Shares </link:label>
<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F231DB5541E01DC81864958D83E6B5C4_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F231DB5541E01DC81864958D83E6B5C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_F231DB5541E01DC81864958D83E6B5C4" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_B0172355527C532C2151958D83E6E749_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_B0172355527C532C2151958D83E6E749" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Beginning balance (in shares) </link:label>
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<link:label id="lab_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_2AF6468CFD40B22461D0958D84D69FB0_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_2AF6468CFD40B22461D0958D84D69FB0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Indefinite-Lived Intangible Assets [Table] </link:label>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_2737D0A29B549CCA9FB6958D84D6722E_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_2737D0A29B549CCA9FB6958D84D6722E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets by Major Class [Axis] </link:label>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F4BE14A3972B979FB0CD958D84D66402_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F4BE14A3972B979FB0CD958D84D66402" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Major Class Name [Domain] </link:label>
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<link:label id="lab_us-gaap_NoncompeteAgreementsMember_2EC105E2A604FA956C97958D84D6D218_terseLabel_en-US" xlink:label="lab_us-gaap_NoncompeteAgreementsMember_2EC105E2A604FA956C97958D84D6D218" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncompete agreements </link:label>
<link:label id="lab_us-gaap_NoncompeteAgreementsMember_2EC105E2A604FA956C97958D84D6D218_label_en-US" xlink:label="lab_us-gaap_NoncompeteAgreementsMember_2EC105E2A604FA956C97958D84D6D218" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncompete Agreements [Member] </link:label>
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<link:label id="lab_us-gaap_OtherIntangibleAssetsMember_D3C648EDB486C9000AB9958D84D6B0C1_terseLabel_en-US" xlink:label="lab_us-gaap_OtherIntangibleAssetsMember_D3C648EDB486C9000AB9958D84D6B0C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other intangible assets </link:label>
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<link:label id="lab_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_F3A8F89A64C083BE56DD958D84D65F25_terseLabel_en-US" xlink:label="lab_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_F3A8F89A64C083BE56DD958D84D65F25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Indefinite-lived Intangible Assets, Major Class Name [Domain] </link:label>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_F3A8F89A64C083BE56DD958D84D65F25" xlink:type="locator"/>
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<link:label id="lab_us-gaap_TrademarksAndTradeNamesMember_1BB8217758F6A3BBB899958D84D6B264_terseLabel_en-US" xlink:label="lab_us-gaap_TrademarksAndTradeNamesMember_1BB8217758F6A3BBB899958D84D6B264" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Indefinite-lived trademarks and trade name </link:label>
<link:label id="lab_us-gaap_TrademarksAndTradeNamesMember_1BB8217758F6A3BBB899958D84D6B264_label_en-US" xlink:label="lab_us-gaap_TrademarksAndTradeNamesMember_1BB8217758F6A3BBB899958D84D6B264" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Trademarks and Trade Names [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TrademarksAndTradeNamesMember" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_1BB8217758F6A3BBB899958D84D6B264" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_1EE41E90BBA44A78945B958D84D65B7B_terseLabel_en-US" xlink:label="lab_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_1EE41E90BBA44A78945B958D84D65B7B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Indefinite-lived Intangible Assets [Line Items] </link:label>
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<link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_C416236BF704BAB3A7E9958D84D64D62_verboseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_C416236BF704BAB3A7E9958D84D64D62" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Intangible assets: </link:label>
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<link:label id="lab_us-gaap_EarningsPerShareBasicAbstract_28F23076B73394A62F0BD9566BEB348E_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAbstract_28F23076B73394A62F0BD9566BEB348E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Earnings Per Share, Basic [Abstract] </link:label>
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<link:label id="lab_us-gaap_NetIncomeLoss_86B03A0B56C9584636CBD9566BEB9644_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_86B03A0B56C9584636CBD9566BEB9644" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Net (loss) income attributable to American Renal Associates Holdings, Inc. </link:label>
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<link:label id="lab_us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_16AF59A09B54DF87E881D9566BEB2A4C_negatedLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_16AF59A09B54DF87E881D9566BEB2A4C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Change in the difference between the redemption values and estimated fair values for accounting purposes of the related noncontrolling interests </link:label>
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<link:label id="lab_us-gaap_PlanNameDomain_5AA68EDC69657B024FDD958D8405D7C0_label_en-US" xlink:label="lab_us-gaap_PlanNameDomain_5AA68EDC69657B024FDD958D8405D7C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Plan Name [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_5AA68EDC69657B024FDD958D8405D7C0" xlink:type="locator"/>
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<link:loc xlink:href="ara-20181231.xsd#ara_AmericanRenalAssociatesHoldingsInc.2011StockOptionPlanForNonemployeeDirectorsMember" xlink:label="loc_ara_AmericanRenalAssociatesHoldingsInc.2011StockOptionPlanForNonemployeeDirectorsMember_3BC2384D60955D190F93958D8405A5EA" xlink:type="locator"/>
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<link:label id="lab_ara_BushanskyOnBehalfOfCompanyVBoardOfDirectorsMember_43C399C3BEB386656307958D83C71C7D_terseLabel_en-US" xlink:label="lab_ara_BushanskyOnBehalfOfCompanyVBoardOfDirectorsMember_43C399C3BEB386656307958D83C71C7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Bushansky on Behalf of Company v. Board of Directors </link:label>
<link:label id="lab_ara_BushanskyOnBehalfOfCompanyVBoardOfDirectorsMember_43C399C3BEB386656307958D83C71C7D_label_en-US" xlink:label="lab_ara_BushanskyOnBehalfOfCompanyVBoardOfDirectorsMember_43C399C3BEB386656307958D83C71C7D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Bushansky On Behalf Of Company V Board Of Directors [Member] </link:label>
<link:label id="lab_ara_BushanskyOnBehalfOfCompanyVBoardOfDirectorsMember_43C399C3BEB386656307958D83C71C7D_documentation_en-US" xlink:label="lab_ara_BushanskyOnBehalfOfCompanyVBoardOfDirectorsMember_43C399C3BEB386656307958D83C71C7D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Bushansky On Behalf Of Company V Board Of Directors [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_BushanskyOnBehalfOfCompanyVBoardOfDirectorsMember" xlink:label="loc_ara_BushanskyOnBehalfOfCompanyVBoardOfDirectorsMember_43C399C3BEB386656307958D83C71C7D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LossContingenciesLineItems_42296F67E6DFFD05947F958D83C7A646_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesLineItems_42296F67E6DFFD05947F958D83C7A646" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Loss Contingencies [Line Items] </link:label>
<link:label id="lab_us-gaap_LossContingenciesLineItems_42296F67E6DFFD05947F958D83C7A646_label_en-US" xlink:label="lab_us-gaap_LossContingenciesLineItems_42296F67E6DFFD05947F958D83C7A646" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Loss Contingencies [Line Items] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_42296F67E6DFFD05947F958D83C7A646" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesLineItems_42296F67E6DFFD05947F958D83C7A646" xlink:to="lab_us-gaap_LossContingenciesLineItems_42296F67E6DFFD05947F958D83C7A646" xlink:type="arc"/>
<link:label id="lab_us-gaap_PaymentsForLegalSettlements_035F166838F1C4F92178958D83C7EDC7_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForLegalSettlements_035F166838F1C4F92178958D83C7EDC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Legal settlement amount </link:label>
<link:label id="lab_us-gaap_PaymentsForLegalSettlements_035F166838F1C4F92178958D83C7EDC7_label_en-US" xlink:label="lab_us-gaap_PaymentsForLegalSettlements_035F166838F1C4F92178958D83C7EDC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments for Legal Settlements </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForLegalSettlements" xlink:label="loc_us-gaap_PaymentsForLegalSettlements_035F166838F1C4F92178958D83C7EDC7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForLegalSettlements_035F166838F1C4F92178958D83C7EDC7" xlink:to="lab_us-gaap_PaymentsForLegalSettlements_035F166838F1C4F92178958D83C7EDC7" xlink:type="arc"/>
<link:label id="lab_ara_LitigationSettlementNumberOfPaymentInstallments_A3C516416D7C776923C2958D83C74F42_terseLabel_en-US" xlink:label="lab_ara_LitigationSettlementNumberOfPaymentInstallments_A3C516416D7C776923C2958D83C74F42" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of payment installments for litigation settlement </link:label>
<link:label id="lab_ara_LitigationSettlementNumberOfPaymentInstallments_A3C516416D7C776923C2958D83C74F42_label_en-US" xlink:label="lab_ara_LitigationSettlementNumberOfPaymentInstallments_A3C516416D7C776923C2958D83C74F42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Litigation Settlement, Number Of Payment Installments </link:label>
<link:label id="lab_ara_LitigationSettlementNumberOfPaymentInstallments_A3C516416D7C776923C2958D83C74F42_documentation_en-US" xlink:label="lab_ara_LitigationSettlementNumberOfPaymentInstallments_A3C516416D7C776923C2958D83C74F42" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Litigation Settlement, Number Of Payment Installments </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_LitigationSettlementNumberOfPaymentInstallments" xlink:label="loc_ara_LitigationSettlementNumberOfPaymentInstallments_A3C516416D7C776923C2958D83C74F42" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_LitigationSettlementNumberOfPaymentInstallments_A3C516416D7C776923C2958D83C74F42" xlink:to="lab_ara_LitigationSettlementNumberOfPaymentInstallments_A3C516416D7C776923C2958D83C74F42" xlink:type="arc"/>
<link:label id="lab_us-gaap_LitigationReserve_556F04FCB0561C048FEC958D83C75BF2_terseLabel_en-US" xlink:label="lab_us-gaap_LitigationReserve_556F04FCB0561C048FEC958D83C75BF2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Initial present value of settlement </link:label>
<link:label id="lab_us-gaap_LitigationReserve_556F04FCB0561C048FEC958D83C75BF2_label_en-US" xlink:label="lab_us-gaap_LitigationReserve_556F04FCB0561C048FEC958D83C75BF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Estimated Litigation Liability </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LitigationReserve" xlink:label="loc_us-gaap_LitigationReserve_556F04FCB0561C048FEC958D83C75BF2" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LitigationReserve_556F04FCB0561C048FEC958D83C75BF2" xlink:to="lab_us-gaap_LitigationReserve_556F04FCB0561C048FEC958D83C75BF2" xlink:type="arc"/>
<link:label id="lab_us-gaap_AccruedLiabilitiesCurrent_CE2799A51AB5D2E89A80958D83C711EF_verboseLabel_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_CE2799A51AB5D2E89A80958D83C711EF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Classified as accrued expenses and other current liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_CE2799A51AB5D2E89A80958D83C711EF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_CE2799A51AB5D2E89A80958D83C711EF" xlink:to="lab_us-gaap_AccruedLiabilitiesCurrent_CE2799A51AB5D2E89A80958D83C711EF" xlink:type="arc"/>
<link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_788E0E267022CAE1F5AB958D83C70B8A_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_788E0E267022CAE1F5AB958D83C70B8A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Classified in other long-term liabilities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_788E0E267022CAE1F5AB958D83C70B8A" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrent_788E0E267022CAE1F5AB958D83C70B8A" xlink:to="lab_us-gaap_OtherLiabilitiesNoncurrent_788E0E267022CAE1F5AB958D83C70B8A" xlink:type="arc"/>
<link:label id="lab_us-gaap_OtherCommitmentDueInNextTwelveMonths_733F4DC91818F10A7711958D83C7E9C6_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInNextTwelveMonths_733F4DC91818F10A7711958D83C7E9C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> First installment </link:label>
<link:label id="lab_us-gaap_OtherCommitmentDueInNextTwelveMonths_733F4DC91818F10A7711958D83C7E9C6_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInNextTwelveMonths_733F4DC91818F10A7711958D83C7E9C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Commitment, Due in Next Twelve Months </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInNextTwelveMonths" xlink:label="loc_us-gaap_OtherCommitmentDueInNextTwelveMonths_733F4DC91818F10A7711958D83C7E9C6" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherCommitmentDueInSecondYear_41566316F3FAB670718F958D83C754B0_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInSecondYear_41566316F3FAB670718F958D83C754B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Installment paid August 1, 2019 </link:label>
<link:label id="lab_us-gaap_OtherCommitmentDueInSecondYear_41566316F3FAB670718F958D83C754B0_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInSecondYear_41566316F3FAB670718F958D83C754B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Commitment, Due in Second Year </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInSecondYear" xlink:label="loc_us-gaap_OtherCommitmentDueInSecondYear_41566316F3FAB670718F958D83C754B0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherCommitmentDueInThirdYear_B0256FCFBC2A53F328C1958D83C7CC14_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInThirdYear_B0256FCFBC2A53F328C1958D83C7CC14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Installment to be paid August 1, 2020 </link:label>
<link:label id="lab_us-gaap_OtherCommitmentDueInThirdYear_B0256FCFBC2A53F328C1958D83C7CC14_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInThirdYear_B0256FCFBC2A53F328C1958D83C7CC14" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Commitment, Due in Third Year </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInThirdYear" xlink:label="loc_us-gaap_OtherCommitmentDueInThirdYear_B0256FCFBC2A53F328C1958D83C7CC14" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherCommitmentDueInFourthYear_690E3065EA8B70DD87C9958D83C7D872_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInFourthYear_690E3065EA8B70DD87C9958D83C7D872" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Installment to be paid August 1, 2021 </link:label>
<link:label id="lab_us-gaap_OtherCommitmentDueInFourthYear_690E3065EA8B70DD87C9958D83C7D872_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInFourthYear_690E3065EA8B70DD87C9958D83C7D872" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Commitment, Due in Fourth Year </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInFourthYear" xlink:label="loc_us-gaap_OtherCommitmentDueInFourthYear_690E3065EA8B70DD87C9958D83C7D872" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherCommitmentDueInFifthYear_758C97E8EB0DC1B97BFF958D83C7DB32_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInFifthYear_758C97E8EB0DC1B97BFF958D83C7DB32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Installment to be paid August 1, 2022 </link:label>
<link:label id="lab_us-gaap_OtherCommitmentDueInFifthYear_758C97E8EB0DC1B97BFF958D83C7DB32_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentDueInFifthYear_758C97E8EB0DC1B97BFF958D83C7DB32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Commitment, Due in Fifth Year </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentDueInFifthYear" xlink:label="loc_us-gaap_OtherCommitmentDueInFifthYear_758C97E8EB0DC1B97BFF958D83C7DB32" xlink:type="locator"/>
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<link:label id="lab_ara_LitigationSettlementAgreementTerm_074ADF05F314517E8629958D83C770F5_terseLabel_en-US" xlink:label="lab_ara_LitigationSettlementAgreementTerm_074ADF05F314517E8629958D83C770F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Term of agreement </link:label>
<link:label id="lab_ara_LitigationSettlementAgreementTerm_074ADF05F314517E8629958D83C770F5_label_en-US" xlink:label="lab_ara_LitigationSettlementAgreementTerm_074ADF05F314517E8629958D83C770F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Litigation Settlement, Agreement Term </link:label>
<link:label id="lab_ara_LitigationSettlementAgreementTerm_074ADF05F314517E8629958D83C770F5_documentation_en-US" xlink:label="lab_ara_LitigationSettlementAgreementTerm_074ADF05F314517E8629958D83C770F5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Litigation Settlement, Agreement Term </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_LitigationSettlementAgreementTerm" xlink:label="loc_ara_LitigationSettlementAgreementTerm_074ADF05F314517E8629958D83C770F5" xlink:type="locator"/>
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<link:label id="lab_us-gaap_MediumTermNotesMember_1C34A41D1552E55C3CE39AE923AF9869_verboseLabel_en-US" xlink:label="lab_us-gaap_MediumTermNotesMember_1C34A41D1552E55C3CE39AE923AF9869" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Term Loans </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MediumTermNotesMember" xlink:label="loc_us-gaap_MediumTermNotesMember_1C34A41D1552E55C3CE39AE923AF9869" xlink:type="locator"/>
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<link:label id="lab_us-gaap_LoansPayableMember_B3368BD9FFEE674D255D9AE923B03739_verboseLabel_en-US" xlink:label="lab_us-gaap_LoansPayableMember_B3368BD9FFEE674D255D9AE923B03739" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Loans Payable </link:label>
<link:label id="lab_us-gaap_LoansPayableMember_B3368BD9FFEE674D255D9AE923B03739_label_en-US" xlink:label="lab_us-gaap_LoansPayableMember_B3368BD9FFEE674D255D9AE923B03739" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Loans Payable [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansPayableMember" xlink:label="loc_us-gaap_LoansPayableMember_B3368BD9FFEE674D255D9AE923B03739" xlink:type="locator"/>
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<link:label id="lab_ara_OtherTermLoansMember_8B16C36A46823F862E579AE923B053FA_terseLabel_en-US" xlink:label="lab_ara_OtherTermLoansMember_8B16C36A46823F862E579AE923B053FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other Term Loans </link:label>
<link:label id="lab_ara_OtherTermLoansMember_8B16C36A46823F862E579AE923B053FA_label_en-US" xlink:label="lab_ara_OtherTermLoansMember_8B16C36A46823F862E579AE923B053FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Term Loans [Member] </link:label>
<link:label id="lab_ara_OtherTermLoansMember_8B16C36A46823F862E579AE923B053FA_documentation_en-US" xlink:label="lab_ara_OtherTermLoansMember_8B16C36A46823F862E579AE923B053FA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Other Term Loans [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OtherTermLoansMember" xlink:label="loc_ara_OtherTermLoansMember_8B16C36A46823F862E579AE923B053FA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OtherTermLoansMember_8B16C36A46823F862E579AE923B053FA" xlink:to="lab_ara_OtherTermLoansMember_8B16C36A46823F862E579AE923B053FA" xlink:type="arc"/>
<link:label id="lab_ara_OtherLineOfCreditMember_1D5EAC44C5D1C3CD3DE69AEF7785CFBE_terseLabel_en-US" xlink:label="lab_ara_OtherLineOfCreditMember_1D5EAC44C5D1C3CD3DE69AEF7785CFBE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other Line Of Credit </link:label>
<link:label id="lab_ara_OtherLineOfCreditMember_1D5EAC44C5D1C3CD3DE69AEF7785CFBE_label_en-US" xlink:label="lab_ara_OtherLineOfCreditMember_1D5EAC44C5D1C3CD3DE69AEF7785CFBE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Other Line Of Credit [Member] </link:label>
<link:label id="lab_ara_OtherLineOfCreditMember_1D5EAC44C5D1C3CD3DE69AEF7785CFBE_documentation_en-US" xlink:label="lab_ara_OtherLineOfCreditMember_1D5EAC44C5D1C3CD3DE69AEF7785CFBE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Other Line Of Credit [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OtherLineOfCreditMember" xlink:label="loc_ara_OtherLineOfCreditMember_1D5EAC44C5D1C3CD3DE69AEF7785CFBE" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OtherLineOfCreditMember_1D5EAC44C5D1C3CD3DE69AEF7785CFBE" xlink:to="lab_ara_OtherLineOfCreditMember_1D5EAC44C5D1C3CD3DE69AEF7785CFBE" xlink:type="arc"/>
<link:label id="lab_us-gaap_NotesPayableOtherPayablesMember_6A9F56E243BC9AF5130C9AE923B05DB0_terseLabel_en-US" xlink:label="lab_us-gaap_NotesPayableOtherPayablesMember_6A9F56E243BC9AF5130C9AE923B05DB0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Other </link:label>
<link:label id="lab_us-gaap_NotesPayableOtherPayablesMember_6A9F56E243BC9AF5130C9AE923B05DB0_label_en-US" xlink:label="lab_us-gaap_NotesPayableOtherPayablesMember_6A9F56E243BC9AF5130C9AE923B05DB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Notes Payable, Other Payables [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NotesPayableOtherPayablesMember" xlink:label="loc_us-gaap_NotesPayableOtherPayablesMember_6A9F56E243BC9AF5130C9AE923B05DB0" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NotesPayableOtherPayablesMember_6A9F56E243BC9AF5130C9AE923B05DB0" xlink:to="lab_us-gaap_NotesPayableOtherPayablesMember_6A9F56E243BC9AF5130C9AE923B05DB0" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_A65BC3807387CF0A1C799AE923B028D5_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount_A65BC3807387CF0A1C799AE923B028D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term debt, gross </link:label>
<link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_A65BC3807387CF0A1C799AE923B028D5_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount_A65BC3807387CF0A1C799AE923B028D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Gross </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_A65BC3807387CF0A1C799AE923B028D5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_A65BC3807387CF0A1C799AE923B028D5" xlink:to="lab_us-gaap_DebtInstrumentCarryingAmount_A65BC3807387CF0A1C799AE923B028D5" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeaseObligations_F00C009A41D89FE3BF779AE923B18BE7_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligations_F00C009A41D89FE3BF779AE923B18BE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Capital Lease Obligations </link:label>
<link:label id="lab_us-gaap_CapitalLeaseObligations_F00C009A41D89FE3BF779AE923B18BE7_label_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligations_F00C009A41D89FE3BF779AE923B18BE7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Lease Obligations </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeaseObligations" xlink:label="loc_us-gaap_CapitalLeaseObligations_F00C009A41D89FE3BF779AE923B18BE7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeaseObligations_F00C009A41D89FE3BF779AE923B18BE7" xlink:to="lab_us-gaap_CapitalLeaseObligations_F00C009A41D89FE3BF779AE923B18BE7" xlink:type="arc"/>
<link:label id="lab_ara_LongtermDebtGrossAndLeaseObligationGross_F256B04FFE9AB17997EE9AE923B1F726_terseLabel_en-US" xlink:label="lab_ara_LongtermDebtGrossAndLeaseObligationGross_F256B04FFE9AB17997EE9AE923B1F726" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term debt, gross and lease obligation, gross </link:label>
<link:label id="lab_ara_LongtermDebtGrossAndLeaseObligationGross_F256B04FFE9AB17997EE9AE923B1F726_label_en-US" xlink:label="lab_ara_LongtermDebtGrossAndLeaseObligationGross_F256B04FFE9AB17997EE9AE923B1F726" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Gross And Lease Obligation, Gross </link:label>
<link:label id="lab_ara_LongtermDebtGrossAndLeaseObligationGross_F256B04FFE9AB17997EE9AE923B1F726_documentation_en-US" xlink:label="lab_ara_LongtermDebtGrossAndLeaseObligationGross_F256B04FFE9AB17997EE9AE923B1F726" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Long-term Debt, Gross And Lease Obligation, Gross </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_LongtermDebtGrossAndLeaseObligationGross" xlink:label="loc_ara_LongtermDebtGrossAndLeaseObligationGross_F256B04FFE9AB17997EE9AE923B1F726" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_LongtermDebtGrossAndLeaseObligationGross_F256B04FFE9AB17997EE9AE923B1F726" xlink:to="lab_ara_LongtermDebtGrossAndLeaseObligationGross_F256B04FFE9AB17997EE9AE923B1F726" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_184C680314B4DD31BBA19AE923B10203_negatedLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_184C680314B4DD31BBA19AE923B10203" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Less: discounts and fees, net of accumulated amortization </link:label>
<link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_184C680314B4DD31BBA19AE923B10203_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_184C680314B4DD31BBA19AE923B10203" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_184C680314B4DD31BBA19AE923B10203" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_184C680314B4DD31BBA19AE923B10203" xlink:to="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_184C680314B4DD31BBA19AE923B10203" xlink:type="arc"/>
<link:label id="lab_us-gaap_LongTermDebtCurrent_1BD84DB9E30106237EA59AE923B3E1B7_negatedLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent_1BD84DB9E30106237EA59AE923B3E1B7" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Less: current maturities </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_1BD84DB9E30106237EA59AE923B3E1B7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtCurrent_1BD84DB9E30106237EA59AE923B3E1B7" xlink:to="lab_us-gaap_LongTermDebtCurrent_1BD84DB9E30106237EA59AE923B3E1B7" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_66B2E77766B67305B18A958D8453A7B8_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_66B2E77766B67305B18A958D8453A7B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Operating Leases </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_66B2E77766B67305B18A958D8453A7B8_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_66B2E77766B67305B18A958D8453A7B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_66B2E77766B67305B18A958D8453A7B8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_66B2E77766B67305B18A958D8453A7B8" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_66B2E77766B67305B18A958D8453A7B8" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5DDA44137D0D2C3D71A2958D84537C84_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5DDA44137D0D2C3D71A2958D84537C84" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> 2018 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5DDA44137D0D2C3D71A2958D84537C84_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5DDA44137D0D2C3D71A2958D84537C84" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments Due, Next Twelve Months </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5DDA44137D0D2C3D71A2958D84537C84" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5DDA44137D0D2C3D71A2958D84537C84" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5DDA44137D0D2C3D71A2958D84537C84" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_7D95F4BE0D8489BBADAB958D8453F422_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_7D95F4BE0D8489BBADAB958D8453F422" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2019 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_7D95F4BE0D8489BBADAB958D8453F422_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_7D95F4BE0D8489BBADAB958D8453F422" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Two Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_7D95F4BE0D8489BBADAB958D8453F422" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_7D95F4BE0D8489BBADAB958D8453F422" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_7D95F4BE0D8489BBADAB958D8453F422" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_CAA3EB667F0B1E9B67A6958D84535662_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_CAA3EB667F0B1E9B67A6958D84535662" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_CAA3EB667F0B1E9B67A6958D84535662_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_CAA3EB667F0B1E9B67A6958D84535662" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Three Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_CAA3EB667F0B1E9B67A6958D84535662" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_CAA3EB667F0B1E9B67A6958D84535662" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_CAA3EB667F0B1E9B67A6958D84535662" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A1338AF3BE25596BCA09958D84536268_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A1338AF3BE25596BCA09958D84536268" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A1338AF3BE25596BCA09958D84536268_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A1338AF3BE25596BCA09958D84536268" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Four Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A1338AF3BE25596BCA09958D84536268" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A1338AF3BE25596BCA09958D84536268" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A1338AF3BE25596BCA09958D84536268" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_F05ED655B9833BE5D2AB958D8453FBFF_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_F05ED655B9833BE5D2AB958D8453FBFF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_F05ED655B9833BE5D2AB958D8453FBFF_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_F05ED655B9833BE5D2AB958D8453FBFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due in Five Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_F05ED655B9833BE5D2AB958D8453FBFF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_F05ED655B9833BE5D2AB958D8453FBFF" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_F05ED655B9833BE5D2AB958D8453FBFF" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_C2CF2F0A146886745270958D84536766_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_C2CF2F0A146886745270958D84536766" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Thereafter </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_C2CF2F0A146886745270958D84536766_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_C2CF2F0A146886745270958D84536766" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments, Due Thereafter </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_C2CF2F0A146886745270958D84536766" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_C2CF2F0A146886745270958D84536766" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_C2CF2F0A146886745270958D84536766" xlink:type="arc"/>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5EBD79A01F9ED0CEB19E958D84536B23_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5EBD79A01F9ED0CEB19E958D84536B23" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total operating leases </link:label>
<link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5EBD79A01F9ED0CEB19E958D84536B23_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5EBD79A01F9ED0CEB19E958D84536B23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Future Minimum Payments Due </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5EBD79A01F9ED0CEB19E958D84536B23" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5EBD79A01F9ED0CEB19E958D84536B23" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5EBD79A01F9ED0CEB19E958D84536B23" xlink:type="arc"/>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsAbstract_8CAEB93E1298FA20F027958D84534B27_terseLabel_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsAbstract_8CAEB93E1298FA20F027958D84534B27" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Less: Sublease Receipts </link:label>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsAbstract_8CAEB93E1298FA20F027958D84534B27_label_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsAbstract_8CAEB93E1298FA20F027958D84534B27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Future Minimum Sublease Rentals, Sale Leaseback Transactions, Fiscal Year Maturity [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsAbstract" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsAbstract_8CAEB93E1298FA20F027958D84534B27" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsAbstract_8CAEB93E1298FA20F027958D84534B27" xlink:to="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsAbstract_8CAEB93E1298FA20F027958D84534B27" xlink:type="arc"/>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_AC506C1D2187B7B63799958D8453DCB8_verboseLabel_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_AC506C1D2187B7B63799958D8453DCB8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> 2018 </link:label>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_AC506C1D2187B7B63799958D8453DCB8_label_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_AC506C1D2187B7B63799958D8453DCB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Future Minimum Sublease Rentals, Sale Leaseback Transactions, Next Twelve Months </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_AC506C1D2187B7B63799958D8453DCB8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_AC506C1D2187B7B63799958D8453DCB8" xlink:to="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_AC506C1D2187B7B63799958D8453DCB8" xlink:type="arc"/>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_0DF7787CABD2D6EFDE02958D845339F5_terseLabel_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_0DF7787CABD2D6EFDE02958D845339F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2019 </link:label>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_0DF7787CABD2D6EFDE02958D845339F5_label_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_0DF7787CABD2D6EFDE02958D845339F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Future Minimum Sublease Rentals, Sale Leaseback Transactions, within Two Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_0DF7787CABD2D6EFDE02958D845339F5" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_0DF7787CABD2D6EFDE02958D845339F5" xlink:to="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_0DF7787CABD2D6EFDE02958D845339F5" xlink:type="arc"/>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_41E0B08F0A799F34886B958D8453476D_terseLabel_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_41E0B08F0A799F34886B958D8453476D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_41E0B08F0A799F34886B958D8453476D_label_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_41E0B08F0A799F34886B958D8453476D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Future Minimum Sublease Rentals, Sale Leaseback Transactions, within Three Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_41E0B08F0A799F34886B958D8453476D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_41E0B08F0A799F34886B958D8453476D" xlink:to="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_41E0B08F0A799F34886B958D8453476D" xlink:type="arc"/>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_A59BF77A131A85E1726A958D8453FB76_terseLabel_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_A59BF77A131A85E1726A958D8453FB76" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_A59BF77A131A85E1726A958D8453FB76_label_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_A59BF77A131A85E1726A958D8453FB76" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Future Minimum Sublease Rentals, Sale Leaseback Transactions, within Four Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_A59BF77A131A85E1726A958D8453FB76" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_A59BF77A131A85E1726A958D8453FB76" xlink:to="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_A59BF77A131A85E1726A958D8453FB76" xlink:type="arc"/>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_1D4821988288AF31E6F2958D8453180D_terseLabel_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_1D4821988288AF31E6F2958D8453180D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_1D4821988288AF31E6F2958D8453180D_label_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_1D4821988288AF31E6F2958D8453180D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Future Minimum Sublease Rentals, Sale Leaseback Transactions, within Five Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_1D4821988288AF31E6F2958D8453180D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_1D4821988288AF31E6F2958D8453180D" xlink:to="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_1D4821988288AF31E6F2958D8453180D" xlink:type="arc"/>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_AEFC8639F278C89EDBE4958D8453342C_terseLabel_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_AEFC8639F278C89EDBE4958D8453342C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Thereafter </link:label>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_AEFC8639F278C89EDBE4958D8453342C_label_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_AEFC8639F278C89EDBE4958D8453342C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Future Minimum Sublease Rentals, Sale Leaseback Transactions, Thereafter </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_AEFC8639F278C89EDBE4958D8453342C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_AEFC8639F278C89EDBE4958D8453342C" xlink:to="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_AEFC8639F278C89EDBE4958D8453342C" xlink:type="arc"/>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_AD4B52D8FDEACBE21A16958D845347DA_totalLabel_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_AD4B52D8FDEACBE21A16958D845347DA" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total sublease receipts </link:label>
<link:label id="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_AD4B52D8FDEACBE21A16958D845347DA_label_en-US" xlink:label="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_AD4B52D8FDEACBE21A16958D845347DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Future Minimum Sublease Rentals, Sale Leaseback Transactions </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_AD4B52D8FDEACBE21A16958D845347DA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_AD4B52D8FDEACBE21A16958D845347DA" xlink:to="lab_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_AD4B52D8FDEACBE21A16958D845347DA" xlink:type="arc"/>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract_B2F0CEB133AE70ABD3CD958D84538C95_terseLabel_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract_B2F0CEB133AE70ABD3CD958D84538C95" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Net Operating Leases </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract_B2F0CEB133AE70ABD3CD958D84538C95_label_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract_B2F0CEB133AE70ABD3CD958D84538C95" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Net of Sublease Receipts, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract_B2F0CEB133AE70ABD3CD958D84538C95_documentation_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract_B2F0CEB133AE70ABD3CD958D84538C95" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> No definition available. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract" xlink:label="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract_B2F0CEB133AE70ABD3CD958D84538C95" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract_B2F0CEB133AE70ABD3CD958D84538C95" xlink:to="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueFiscalYearMaturityAbstract_B2F0CEB133AE70ABD3CD958D84538C95" xlink:type="arc"/>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths_B2A67C8E220CEE3ACFA1958D8453E9EA_totalLabel_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths_B2A67C8E220CEE3ACFA1958D8453E9EA" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> 2018 </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths_B2A67C8E220CEE3ACFA1958D8453E9EA_label_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths_B2A67C8E220CEE3ACFA1958D8453E9EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Net of Sublease Receipts, Future Minimum Payments, Next Twelve Months </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths_B2A67C8E220CEE3ACFA1958D8453E9EA_documentation_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths_B2A67C8E220CEE3ACFA1958D8453E9EA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of required minimum rental payments, net of sublease receipts for operating leases having an initial or remaining non-cancelable lease term in excess of next fiscal year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths" xlink:label="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths_B2A67C8E220CEE3ACFA1958D8453E9EA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths_B2A67C8E220CEE3ACFA1958D8453E9EA" xlink:to="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsNextTwelveMonths_B2A67C8E220CEE3ACFA1958D8453E9EA" xlink:type="arc"/>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears_4155C4B1419BCC2EA84B958D84537414_totalLabel_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears_4155C4B1419BCC2EA84B958D84537414" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> 2019 </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears_4155C4B1419BCC2EA84B958D84537414_label_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears_4155C4B1419BCC2EA84B958D84537414" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Net of Sublease Receipts, Future Minimum Payments, Due in Two Years </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears_4155C4B1419BCC2EA84B958D84537414_documentation_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears_4155C4B1419BCC2EA84B958D84537414" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of required minimum rental payments, net of sublease receipts for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears_4155C4B1419BCC2EA84B958D84537414" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears_4155C4B1419BCC2EA84B958D84537414" xlink:to="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInTwoYears_4155C4B1419BCC2EA84B958D84537414" xlink:type="arc"/>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears_A795A4E49787FEEA854B958D8453A4A4_totalLabel_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears_A795A4E49787FEEA854B958D8453A4A4" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears_A795A4E49787FEEA854B958D8453A4A4_label_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears_A795A4E49787FEEA854B958D8453A4A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Net of Sublease Receipts, Future Minimum Payments, Due in Three Years </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears_A795A4E49787FEEA854B958D8453A4A4_documentation_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears_A795A4E49787FEEA854B958D8453A4A4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of required minimum rental payments, net of sublease receipts for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears_A795A4E49787FEEA854B958D8453A4A4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears_A795A4E49787FEEA854B958D8453A4A4" xlink:to="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInThreeYears_A795A4E49787FEEA854B958D8453A4A4" xlink:type="arc"/>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears_0418F39330E12978F75D958D84539C35_totalLabel_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears_0418F39330E12978F75D958D84539C35" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears_0418F39330E12978F75D958D84539C35_label_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears_0418F39330E12978F75D958D84539C35" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Net of Sublease Receipts, Future Minimum Payments, Due in Four Years </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears_0418F39330E12978F75D958D84539C35_documentation_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears_0418F39330E12978F75D958D84539C35" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of required minimum rental payments, net of sublease receipts for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears" xlink:label="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears_0418F39330E12978F75D958D84539C35" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears_0418F39330E12978F75D958D84539C35" xlink:to="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFourYears_0418F39330E12978F75D958D84539C35" xlink:type="arc"/>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears_5D984B6525C580BBB008958D8453CACD_totalLabel_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears_5D984B6525C580BBB008958D8453CACD" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears_5D984B6525C580BBB008958D8453CACD_label_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears_5D984B6525C580BBB008958D8453CACD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Net of Sublease Receipts, Future Minimum Payments, Due in Five Years </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears_5D984B6525C580BBB008958D8453CACD_documentation_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears_5D984B6525C580BBB008958D8453CACD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of required minimum rental payments, net of sublease receipts for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears_5D984B6525C580BBB008958D8453CACD" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears_5D984B6525C580BBB008958D8453CACD" xlink:to="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueInFiveYears_5D984B6525C580BBB008958D8453CACD" xlink:type="arc"/>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter_B2EA433A99E8EDC8251F958D84534B31_totalLabel_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter_B2EA433A99E8EDC8251F958D84534B31" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Thereafter </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter_B2EA433A99E8EDC8251F958D84534B31_label_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter_B2EA433A99E8EDC8251F958D84534B31" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Net of Sublease Receipts, Future Minimum Payments, Due Thereafter </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter_B2EA433A99E8EDC8251F958D84534B31_documentation_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter_B2EA433A99E8EDC8251F958D84534B31" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of required minimum rental payments, net of sublease receipts for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter" xlink:label="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter_B2EA433A99E8EDC8251F958D84534B31" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter_B2EA433A99E8EDC8251F958D84534B31" xlink:to="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDueThereafter_B2EA433A99E8EDC8251F958D84534B31" xlink:type="arc"/>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue_9DD1D832DF038E973D4C958D845359EF_totalLabel_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue_9DD1D832DF038E973D4C958D845359EF" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total net lease obligation </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue_9DD1D832DF038E973D4C958D845359EF_label_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue_9DD1D832DF038E973D4C958D845359EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Operating Leases, Net of Sublease Receipts, Future Minimum Payments Due </link:label>
<link:label id="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue_9DD1D832DF038E973D4C958D845359EF_documentation_en-US" xlink:label="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue_9DD1D832DF038E973D4C958D845359EF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of required minimum rental payments, net of sublease receipts for leases having an initial or remaining non-cancelable letter-terms in excess of one year. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue" xlink:label="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue_9DD1D832DF038E973D4C958D845359EF" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue_9DD1D832DF038E973D4C958D845359EF" xlink:to="lab_ara_OperatingLeasesNetOfSubleaseReceiptsFutureMinimumPaymentsDue_9DD1D832DF038E973D4C958D845359EF" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_CB258500ED4924D86648958D84539428_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_CB258500ED4924D86648958D84539428" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Capital Leases </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_CB258500ED4924D86648958D84539428_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_CB258500ED4924D86648958D84539428" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_CB258500ED4924D86648958D84539428" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_CB258500ED4924D86648958D84539428" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_CB258500ED4924D86648958D84539428" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_41A9045CE9A28A26883D958D84531A06_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_41A9045CE9A28A26883D958D84531A06" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2019 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_41A9045CE9A28A26883D958D84531A06_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_41A9045CE9A28A26883D958D84531A06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due, Next Twelve Months </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_41A9045CE9A28A26883D958D84531A06" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_41A9045CE9A28A26883D958D84531A06" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_41A9045CE9A28A26883D958D84531A06" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_1798CF2CEF5290746143958D84538A4C_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_1798CF2CEF5290746143958D84538A4C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2020 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_1798CF2CEF5290746143958D84538A4C_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_1798CF2CEF5290746143958D84538A4C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Two Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_1798CF2CEF5290746143958D84538A4C" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_1798CF2CEF5290746143958D84538A4C" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_1798CF2CEF5290746143958D84538A4C" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_219E3E64486867BE1B4E958D8453AFE4_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_219E3E64486867BE1B4E958D8453AFE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2021 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_219E3E64486867BE1B4E958D8453AFE4_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_219E3E64486867BE1B4E958D8453AFE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Three Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_219E3E64486867BE1B4E958D8453AFE4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_219E3E64486867BE1B4E958D8453AFE4" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_219E3E64486867BE1B4E958D8453AFE4" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_2CB2568CCE9AE45BEA5E958D8453362B_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_2CB2568CCE9AE45BEA5E958D8453362B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2022 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_2CB2568CCE9AE45BEA5E958D8453362B_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_2CB2568CCE9AE45BEA5E958D8453362B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Four Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_2CB2568CCE9AE45BEA5E958D8453362B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_2CB2568CCE9AE45BEA5E958D8453362B" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_2CB2568CCE9AE45BEA5E958D8453362B" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_3DCCF83C803F38C42D84958D8453B386_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_3DCCF83C803F38C42D84958D8453B386" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> 2023 </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_3DCCF83C803F38C42D84958D8453B386_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_3DCCF83C803F38C42D84958D8453B386" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due in Five Years </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_3DCCF83C803F38C42D84958D8453B386" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_3DCCF83C803F38C42D84958D8453B386" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_3DCCF83C803F38C42D84958D8453B386" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_E28F3E16968464411044958D8453F3A8_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_E28F3E16968464411044958D8453F3A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Thereafter </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_E28F3E16968464411044958D8453F3A8_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_E28F3E16968464411044958D8453F3A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due Thereafter </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_E28F3E16968464411044958D8453F3A8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_E28F3E16968464411044958D8453F3A8" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_E28F3E16968464411044958D8453F3A8" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_E896B0693CD4C3167465958D84531C6D_totalLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_E896B0693CD4C3167465958D84531C6D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Total minimum lease payments </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_E896B0693CD4C3167465958D84531C6D_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_E896B0693CD4C3167465958D84531C6D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due </link:label>
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<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_7D1346B5FC30E5D338E9958D8453F731_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_7D1346B5FC30E5D338E9958D8453F731" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Less: amount representing interest </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_7D1346B5FC30E5D338E9958D8453F731_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_7D1346B5FC30E5D338E9958D8453F731" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments, Interest Included in Payments </link:label>
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<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_7D1346B5FC30E5D338E9958D8453F731" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_7D1346B5FC30E5D338E9958D8453F731" xlink:type="arc"/>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsNetMinimumPayments1_F8C8FE62849B506176D8958D845396BD_totalLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsNetMinimumPayments1_F8C8FE62849B506176D8958D845396BD" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Present value of net minimum capital lease payments </link:label>
<link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsNetMinimumPayments1_F8C8FE62849B506176D8958D845396BD_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsNetMinimumPayments1_F8C8FE62849B506176D8958D845396BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Leases, Future Minimum Payments, Net Minimum Payments </link:label>
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<link:label id="lab_us-gaap_CapitalLeaseObligationsCurrent_7F076D3BE769229CA9B0958D84634DC3_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsCurrent_7F076D3BE769229CA9B0958D84634DC3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Less: current installments of obligations under capital leases </link:label>
<link:label id="lab_us-gaap_CapitalLeaseObligationsCurrent_7F076D3BE769229CA9B0958D84634DC3_label_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsCurrent_7F076D3BE769229CA9B0958D84634DC3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Lease Obligations, Current </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeaseObligationsCurrent" xlink:label="loc_us-gaap_CapitalLeaseObligationsCurrent_7F076D3BE769229CA9B0958D84634DC3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CapitalLeaseObligationsNoncurrent_666641128F27F6F85D2B958D846310CE_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsNoncurrent_666641128F27F6F85D2B958D846310CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Long-term capital lease obligation </link:label>
<link:label id="lab_us-gaap_CapitalLeaseObligationsNoncurrent_666641128F27F6F85D2B958D846310CE_label_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsNoncurrent_666641128F27F6F85D2B958D846310CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Capital Lease Obligations, Noncurrent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeaseObligationsNoncurrent" xlink:label="loc_us-gaap_CapitalLeaseObligationsNoncurrent_666641128F27F6F85D2B958D846310CE" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PaymentsOfFinancingCosts_794FED848BC8FD7493CACF536653E0C3_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfFinancingCosts_794FED848BC8FD7493CACF536653E0C3" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Payments of deferred offering costs </link:label>
<link:label id="lab_us-gaap_PaymentsOfFinancingCosts_794FED848BC8FD7493CACF536653E0C3_label_en-US" xlink:label="lab_us-gaap_PaymentsOfFinancingCosts_794FED848BC8FD7493CACF536653E0C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments of Financing Costs </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfFinancingCosts" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts_794FED848BC8FD7493CACF536653E0C3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfFinancingCosts_794FED848BC8FD7493CACF536653E0C3" xlink:to="lab_us-gaap_PaymentsOfFinancingCosts_794FED848BC8FD7493CACF536653E0C3" xlink:type="arc"/>
<link:label id="lab_us-gaap_StatementTable_C201F043FA2514F72AFFFD4D3A641670_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable_C201F043FA2514F72AFFFD4D3A641670" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Statement [Table] </link:label>
<link:label id="lab_us-gaap_StatementTable_C201F043FA2514F72AFFFD4D3A641670_label_en-US" xlink:label="lab_us-gaap_StatementTable_C201F043FA2514F72AFFFD4D3A641670" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement [Table] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_C201F043FA2514F72AFFFD4D3A641670" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable_C201F043FA2514F72AFFFD4D3A641670" xlink:to="lab_us-gaap_StatementTable_C201F043FA2514F72AFFFD4D3A641670" xlink:type="arc"/>
<link:label id="lab_us-gaap_CommonStockMember_1F8B2CA012D2AB46DD71FD4D3A65F9D9_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember_1F8B2CA012D2AB46DD71FD4D3A65F9D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Common Stock </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_1F8B2CA012D2AB46DD71FD4D3A65F9D9" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember_1F8B2CA012D2AB46DD71FD4D3A65F9D9" xlink:to="lab_us-gaap_CommonStockMember_1F8B2CA012D2AB46DD71FD4D3A65F9D9" xlink:type="arc"/>
<link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_0F34245EDB1919C18DC0FD4D3A6567B3_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_0F34245EDB1919C18DC0FD4D3A6567B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Additional Paid-in Capital </link:label>
<link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_0F34245EDB1919C18DC0FD4D3A6567B3_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_0F34245EDB1919C18DC0FD4D3A6567B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Additional Paid-in Capital [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_0F34245EDB1919C18DC0FD4D3A6567B3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalMember_0F34245EDB1919C18DC0FD4D3A6567B3" xlink:to="lab_us-gaap_AdditionalPaidInCapitalMember_0F34245EDB1919C18DC0FD4D3A6567B3" xlink:type="arc"/>
<link:label id="lab_us-gaap_ReceivablesFromStockholderMember_FB03C3A13E4951019FABFD4D3A65236F_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesFromStockholderMember_FB03C3A13E4951019FABFD4D3A65236F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Receivable from Noncontrolling Interest Holders </link:label>
<link:label id="lab_us-gaap_ReceivablesFromStockholderMember_FB03C3A13E4951019FABFD4D3A65236F_label_en-US" xlink:label="lab_us-gaap_ReceivablesFromStockholderMember_FB03C3A13E4951019FABFD4D3A65236F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Receivables from Stockholder [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReceivablesFromStockholderMember" xlink:label="loc_us-gaap_ReceivablesFromStockholderMember_FB03C3A13E4951019FABFD4D3A65236F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivablesFromStockholderMember_FB03C3A13E4951019FABFD4D3A65236F" xlink:to="lab_us-gaap_ReceivablesFromStockholderMember_FB03C3A13E4951019FABFD4D3A65236F" xlink:type="arc"/>
<link:label id="lab_us-gaap_RetainedEarningsMember_9188354A33146D3F2435FD4D3A6595B3_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_9188354A33146D3F2435FD4D3A6595B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Retained Earnings (Deficit) </link:label>
<link:label id="lab_us-gaap_RetainedEarningsMember_9188354A33146D3F2435FD4D3A6595B3_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_9188354A33146D3F2435FD4D3A6595B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Retained Earnings [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_9188354A33146D3F2435FD4D3A6595B3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsMember_9188354A33146D3F2435FD4D3A6595B3" xlink:to="lab_us-gaap_RetainedEarningsMember_9188354A33146D3F2435FD4D3A6595B3" xlink:type="arc"/>
<link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_651AA539D45F8EDE3339FD4D3A660677_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_651AA539D45F8EDE3339FD4D3A660677" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accumulated Other Comprehensive Income (loss) </link:label>
<link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_651AA539D45F8EDE3339FD4D3A660677_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_651AA539D45F8EDE3339FD4D3A660677" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> AOCI Attributable to Parent [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_651AA539D45F8EDE3339FD4D3A660677" xlink:type="locator"/>
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<link:label id="lab_ara_NoncontrollingInterestNoPutProvisionMember_B08548ADFCA3A7E5055EFD4D3A66965D_terseLabel_en-US" xlink:label="lab_ara_NoncontrollingInterestNoPutProvisionMember_B08548ADFCA3A7E5055EFD4D3A66965D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interests not subject to put provisions </link:label>
<link:label id="lab_ara_NoncontrollingInterestNoPutProvisionMember_B08548ADFCA3A7E5055EFD4D3A66965D_label_en-US" xlink:label="lab_ara_NoncontrollingInterestNoPutProvisionMember_B08548ADFCA3A7E5055EFD4D3A66965D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest No Put Provision [Member] </link:label>
<link:label id="lab_ara_NoncontrollingInterestNoPutProvisionMember_B08548ADFCA3A7E5055EFD4D3A66965D_documentation_en-US" xlink:label="lab_ara_NoncontrollingInterestNoPutProvisionMember_B08548ADFCA3A7E5055EFD4D3A66965D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents noncontrolling interests not subject to put provisions </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_NoncontrollingInterestNoPutProvisionMember" xlink:label="loc_ara_NoncontrollingInterestNoPutProvisionMember_B08548ADFCA3A7E5055EFD4D3A66965D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F2938ABC4CB5344643A6FD4D3A66E36D_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F2938ABC4CB5344643A6FD4D3A66E36D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Stockholders' Equity [Roll Forward] </link:label>
<link:label id="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F2938ABC4CB5344643A6FD4D3A66E36D_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F2938ABC4CB5344643A6FD4D3A66E36D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Increase (Decrease) in Stockholders' Equity [Roll Forward] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F2938ABC4CB5344643A6FD4D3A66E36D" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockholdersEquity_92B9B919BACE1E7CC057FD4D3A66FD9C_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_92B9B919BACE1E7CC057FD4D3A66FD9C" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Balance at beginning of period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_92B9B919BACE1E7CC057FD4D3A66FD9C" xlink:type="locator"/>
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<link:label id="lab_us-gaap_SharesOutstanding_C6A03070BC7D4D93ECA3FD4D3A670EC2_periodStartLabel_en-US" xlink:label="lab_us-gaap_SharesOutstanding_C6A03070BC7D4D93ECA3FD4D3A670EC2" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US"> Balance at beginning of period (in shares) </link:label>
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<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_8E3ECA693F60FD81CF75FD4D3A693C68_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_8E3ECA693F60FD81CF75FD4D3A693C68" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Forfeiture of restricted stock options (In shares) </link:label>
<link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_8E3ECA693F60FD81CF75FD4D3A693C68_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_8E3ECA693F60FD81CF75FD4D3A693C68" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Issued During Period, Shares, Restricted Stock Award, Forfeited </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_8E3ECA693F60FD81CF75FD4D3A693C68" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockRepurchasedDuringPeriodShares_40670DED6C776FEBDC95FD4D3A6995D1_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedDuringPeriodShares_40670DED6C776FEBDC95FD4D3A6995D1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Common stock repurchases for tax withholdings of net settlement of equity awards (in shares) </link:label>
<link:label id="lab_us-gaap_StockRepurchasedDuringPeriodShares_40670DED6C776FEBDC95FD4D3A6995D1_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedDuringPeriodShares_40670DED6C776FEBDC95FD4D3A6995D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Repurchased During Period, Shares </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_40670DED6C776FEBDC95FD4D3A6995D1" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockRepurchasedDuringPeriodValue_7B24A23226BE51E36D48FD4D3A6927BD_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedDuringPeriodValue_7B24A23226BE51E36D48FD4D3A6927BD" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Common stock repurchases for tax withholdings of net settlement of equity awards </link:label>
<link:label id="lab_us-gaap_StockRepurchasedDuringPeriodValue_7B24A23226BE51E36D48FD4D3A6927BD_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedDuringPeriodValue_7B24A23226BE51E36D48FD4D3A6927BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stock Repurchased During Period, Value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_7B24A23226BE51E36D48FD4D3A6927BD" xlink:type="locator"/>
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<link:label id="lab_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_9F82304DC24513A291E5FD4D3A6A4F76_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_9F82304DC24513A291E5FD4D3A6A4F76" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Vested restricted stock awards withheld on net share settlement (in shares) </link:label>
<link:label id="lab_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_9F82304DC24513A291E5FD4D3A6A4F76_label_en-US" xlink:label="lab_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_9F82304DC24513A291E5FD4D3A6A4F76" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_9F82304DC24513A291E5FD4D3A6A4F76" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_D26FD95076C7A256620AFD4D3A6A98C0_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_D26FD95076C7A256620AFD4D3A6A98C0" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Vested restricted stock awards withheld on net share settlement </link:label>
<link:label id="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_D26FD95076C7A256620AFD4D3A6A98C0_label_en-US" xlink:label="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_D26FD95076C7A256620AFD4D3A6A98C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share-based Payment Arrangement, Decrease for Tax Withholding Obligation </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_D26FD95076C7A256620AFD4D3A6A98C0" xlink:type="locator"/>
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<link:label id="lab_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D4CF570A153F766513FAFD4D3A6A280A_negatedLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D4CF570A153F766513FAFD4D3A6A280A" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Distributions to noncontrolling interests </link:label>
<link:label id="lab_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D4CF570A153F766513FAFD4D3A6A280A_label_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D4CF570A153F766513FAFD4D3A6A280A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D4CF570A153F766513FAFD4D3A6A280A" xlink:type="locator"/>
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<link:label id="lab_ara_NoncontrollingInterestIncreaseFromContributions_2A536D6E9D71DDC673D9FD4D3A6A6FBA_terseLabel_en-US" xlink:label="lab_ara_NoncontrollingInterestIncreaseFromContributions_2A536D6E9D71DDC673D9FD4D3A6A6FBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Contributions from noncontrolling interests </link:label>
<link:label id="lab_ara_NoncontrollingInterestIncreaseFromContributions_2A536D6E9D71DDC673D9FD4D3A6A6FBA_label_en-US" xlink:label="lab_ara_NoncontrollingInterestIncreaseFromContributions_2A536D6E9D71DDC673D9FD4D3A6A6FBA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest Increase From Contributions </link:label>
<link:label id="lab_ara_NoncontrollingInterestIncreaseFromContributions_2A536D6E9D71DDC673D9FD4D3A6A6FBA_documentation_en-US" xlink:label="lab_ara_NoncontrollingInterestIncreaseFromContributions_2A536D6E9D71DDC673D9FD4D3A6A6FBA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Noncontrolling interest increase from contributions. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_NoncontrollingInterestIncreaseFromContributions" xlink:label="loc_ara_NoncontrollingInterestIncreaseFromContributions_2A536D6E9D71DDC673D9FD4D3A6A6FBA" xlink:type="locator"/>
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<link:label id="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_2C590B8906D62AAB3668FD4D3A6ADC76_negatedLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_2C590B8906D62AAB3668FD4D3A6ADC76" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US"> Purchases of noncontrolling interests </link:label>
<link:label id="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_2C590B8906D62AAB3668FD4D3A6ADC76_label_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_2C590B8906D62AAB3668FD4D3A6ADC76" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_2C590B8906D62AAB3668FD4D3A6ADC76" xlink:type="locator"/>
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<link:label id="lab_ara_NoncontrollingInterestDecreasefromRedemptions_22A08AD76615163759B3FD51993BE841_negatedTerseLabel_en-US" xlink:label="lab_ara_NoncontrollingInterestDecreasefromRedemptions_22A08AD76615163759B3FD51993BE841" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Sales of noncontrolling interests </link:label>
<link:label id="lab_ara_NoncontrollingInterestDecreasefromRedemptions_22A08AD76615163759B3FD51993BE841_label_en-US" xlink:label="lab_ara_NoncontrollingInterestDecreasefromRedemptions_22A08AD76615163759B3FD51993BE841" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest, Decrease from Redemptions </link:label>
<link:label id="lab_ara_NoncontrollingInterestDecreasefromRedemptions_22A08AD76615163759B3FD51993BE841_documentation_en-US" xlink:label="lab_ara_NoncontrollingInterestDecreasefromRedemptions_22A08AD76615163759B3FD51993BE841" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest, Decrease from Redemptions </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_NoncontrollingInterestDecreasefromRedemptions" xlink:label="loc_ara_NoncontrollingInterestDecreasefromRedemptions_22A08AD76615163759B3FD51993BE841" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ReclassificationsOfTemporaryToPermanentEquity_8F94817DC309E666AEF2FD4D3A6B1131_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationsOfTemporaryToPermanentEquity_8F94817DC309E666AEF2FD4D3A6B1131" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Reclassification and other adjustments </link:label>
<link:label id="lab_us-gaap_ReclassificationsOfTemporaryToPermanentEquity_8F94817DC309E666AEF2FD4D3A6B1131_label_en-US" xlink:label="lab_us-gaap_ReclassificationsOfTemporaryToPermanentEquity_8F94817DC309E666AEF2FD4D3A6B1131" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Reclassifications of Temporary to Permanent Equity </link:label>
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<link:label id="lab_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_D65058A32394E12E380FFD4D3A6BC9E3_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_D65058A32394E12E380FFD4D3A6BC9E3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Change in fair value of interest rate swaps, net of tax </link:label>
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<link:label id="lab_us-gaap_MinorityInterestChangeInRedemptionValue_2D58AE7049DB70DAE83DFD4D3A6B83AE_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestChangeInRedemptionValue_2D58AE7049DB70DAE83DFD4D3A6B83AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Change in fair value of noncontrolling interests </link:label>
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<link:label id="lab_us-gaap_StockholdersEquity_8E160DB16123C672D09CFD4D3A6BB572_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_8E160DB16123C672D09CFD4D3A6BB572" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Balance at end of period </link:label>
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<link:label id="lab_us-gaap_SharesOutstanding_D12788815B89ABA10E3EFD4D3A6B1D9F_periodEndLabel_en-US" xlink:label="lab_us-gaap_SharesOutstanding_D12788815B89ABA10E3EFD4D3A6B1D9F" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US"> Balance at end of period (in shares) </link:label>
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<link:label id="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_F248C4E552F080BD8109958D8444B84F_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_F248C4E552F080BD8109958D8444B84F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of provision (benefit) for income taxes </link:label>
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<link:label id="lab_us-gaap_LienCategoryAxis_0B13804BD85745912002958D84F64956_label_en-US" xlink:label="lab_us-gaap_LienCategoryAxis_0B13804BD85745912002958D84F64956" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lien Category [Axis] </link:label>
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<link:label id="lab_us-gaap_LienCategoryDomain_783B9987BF92CFC901AF958D84F663BE_terseLabel_en-US" xlink:label="lab_us-gaap_LienCategoryDomain_783B9987BF92CFC901AF958D84F663BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Lien Category [Domain] </link:label>
<link:label id="lab_us-gaap_LienCategoryDomain_783B9987BF92CFC901AF958D84F663BE_label_en-US" xlink:label="lab_us-gaap_LienCategoryDomain_783B9987BF92CFC901AF958D84F663BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Lien Category [Domain] </link:label>
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<link:label id="lab_us-gaap_SeniorLienMember_4ADCF811F81B0BFB9332958D84F6827C_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorLienMember_4ADCF811F81B0BFB9332958D84F6827C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> First lien term loans </link:label>
<link:label id="lab_us-gaap_SeniorLienMember_4ADCF811F81B0BFB9332958D84F6827C_label_en-US" xlink:label="lab_us-gaap_SeniorLienMember_4ADCF811F81B0BFB9332958D84F6827C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Senior Lien [Member] </link:label>
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<link:label id="lab_ara_FairValueAssetsBetweenLevel1Level2Level3TransfersAmount_579FCF1A6C0B9F3EC0AB958D84F62FED_terseLabel_en-US" xlink:label="lab_ara_FairValueAssetsBetweenLevel1Level2Level3TransfersAmount_579FCF1A6C0B9F3EC0AB958D84F62FED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Transfers between Levels 1, 2 and 3 </link:label>
<link:label id="lab_ara_FairValueAssetsBetweenLevel1Level2Level3TransfersAmount_579FCF1A6C0B9F3EC0AB958D84F62FED_label_en-US" xlink:label="lab_ara_FairValueAssetsBetweenLevel1Level2Level3TransfersAmount_579FCF1A6C0B9F3EC0AB958D84F62FED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Fair Value Assets Between Level 1 Level 2 Level 3 Transfers Amount </link:label>
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<link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_3A1F41E6644B25F44FA6958D84F687C3_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount_3A1F41E6644B25F44FA6958D84F687C3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Carrying amount of debt </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_3A1F41E6644B25F44FA6958D84F687C3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DebtInstrumentFairValue_E6FA705E4875E7A8FA68958D84F67EFF_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFairValue_E6FA705E4875E7A8FA68958D84F67EFF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Fair value of debt </link:label>
<link:label id="lab_us-gaap_DebtInstrumentFairValue_E6FA705E4875E7A8FA68958D84F67EFF_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFairValue_E6FA705E4875E7A8FA68958D84F67EFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Fair Value Disclosure </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="loc_us-gaap_DebtInstrumentFairValue_E6FA705E4875E7A8FA68958D84F67EFF" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_795D4BFAC340C7303E5A958D8424D4C7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_795D4BFAC340C7303E5A958D8424D4C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of basic and diluted earnings (loss) per share </link:label>
<link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_795D4BFAC340C7303E5A958D8424D4C7_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_795D4BFAC340C7303E5A958D8424D4C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] </link:label>
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<link:label id="lab_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock_9D4008A8C6D20DC50DA6958D85255B1C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock_9D4008A8C6D20DC50DA6958D85255B1C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Reconciliation of Cash and Restricted Cash Reported within the Balance Sheet to the Total shown in the Statement of Cash Flows </link:label>
<link:label id="lab_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock_9D4008A8C6D20DC50DA6958D85255B1C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock_9D4008A8C6D20DC50DA6958D85255B1C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Cash and Cash Equivalents [Table Text Block] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock_9D4008A8C6D20DC50DA6958D85255B1C" xlink:type="locator"/>
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<link:label id="lab_ara_ScheduleofInitialPublicOfferingTable_A5400B0E0A1D40ED7B609C31E1F0958F_terseLabel_en-US" xlink:label="lab_ara_ScheduleofInitialPublicOfferingTable_A5400B0E0A1D40ED7B609C31E1F0958F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Schedule of Initial Public Offering [Table] </link:label>
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<link:label id="lab_ara_ScheduleofInitialPublicOfferingTable_A5400B0E0A1D40ED7B609C31E1F0958F_documentation_en-US" xlink:label="lab_ara_ScheduleofInitialPublicOfferingTable_A5400B0E0A1D40ED7B609C31E1F0958F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Schedule of Initial Public Offering [Table] </link:label>
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<link:label id="lab_us-gaap_SubsidiarySaleOfStockAxis_31CFFB282AD6D793F06C9C31E1F159C6_terseLabel_en-US" xlink:label="lab_us-gaap_SubsidiarySaleOfStockAxis_31CFFB282AD6D793F06C9C31E1F159C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Sale of Stock [Axis] </link:label>
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<link:label id="lab_us-gaap_IPOMember_956865D6D55D41F9252D9C31E1F2619B_terseLabel_en-US" xlink:label="lab_us-gaap_IPOMember_956865D6D55D41F9252D9C31E1F2619B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> IPO </link:label>
<link:label id="lab_us-gaap_IPOMember_956865D6D55D41F9252D9C31E1F2619B_label_en-US" xlink:label="lab_us-gaap_IPOMember_956865D6D55D41F9252D9C31E1F2619B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> IPO [Member] </link:label>
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<link:label id="lab_ara_VestedOptionStockholdersMember_4F31AC3033802F986AF19C31E1F29333_terseLabel_en-US" xlink:label="lab_ara_VestedOptionStockholdersMember_4F31AC3033802F986AF19C31E1F29333" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Vested Option Stockholders </link:label>
<link:label id="lab_ara_VestedOptionStockholdersMember_4F31AC3033802F986AF19C31E1F29333_label_en-US" xlink:label="lab_ara_VestedOptionStockholdersMember_4F31AC3033802F986AF19C31E1F29333" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Vested Option Stockholders [Member] </link:label>
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<link:label id="lab_us-gaap_ShortTermDebtTypeAxis_4BB768B39CAF77B8E5139C31E1F3CCBA_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis_4BB768B39CAF77B8E5139C31E1F3CCBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Type [Axis] </link:label>
<link:label id="lab_us-gaap_ShortTermDebtTypeAxis_4BB768B39CAF77B8E5139C31E1F3CCBA_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis_4BB768B39CAF77B8E5139C31E1F3CCBA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Type [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_4BB768B39CAF77B8E5139C31E1F3CCBA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_4BB768B39CAF77B8E5139C31E1F3CCBA" xlink:to="lab_us-gaap_ShortTermDebtTypeAxis_4BB768B39CAF77B8E5139C31E1F3CCBA" xlink:type="arc"/>
<link:label id="lab_us-gaap_ShortTermDebtTypeDomain_D776E90C6D12FE303CBE9C31E1F3114D_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain_D776E90C6D12FE303CBE9C31E1F3114D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Type [Domain] </link:label>
<link:label id="lab_us-gaap_ShortTermDebtTypeDomain_D776E90C6D12FE303CBE9C31E1F3114D_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain_D776E90C6D12FE303CBE9C31E1F3114D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Short-term Debt, Type [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_D776E90C6D12FE303CBE9C31E1F3114D" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_D776E90C6D12FE303CBE9C31E1F3114D" xlink:to="lab_us-gaap_ShortTermDebtTypeDomain_D776E90C6D12FE303CBE9C31E1F3114D" xlink:type="arc"/>
<link:label id="lab_us-gaap_LoansPayableMember_E95B9F4CE2F33404598D9C31E1F33C49_terseLabel_en-US" xlink:label="lab_us-gaap_LoansPayableMember_E95B9F4CE2F33404598D9C31E1F33C49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Clinic Loan </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansPayableMember" xlink:label="loc_us-gaap_LoansPayableMember_E95B9F4CE2F33404598D9C31E1F33C49" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansPayableMember_E95B9F4CE2F33404598D9C31E1F33C49" xlink:to="lab_us-gaap_LoansPayableMember_E95B9F4CE2F33404598D9C31E1F33C49" xlink:type="arc"/>
<link:label id="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_23653FF04BEF8ECF078A9C31E1F39A64_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_23653FF04BEF8ECF078A9C31E1F39A64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Loss Contingency Nature [Axis] </link:label>
<link:label id="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_23653FF04BEF8ECF078A9C31E1F39A64_label_en-US" xlink:label="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_23653FF04BEF8ECF078A9C31E1F39A64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Loss Contingency Nature [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_23653FF04BEF8ECF078A9C31E1F39A64" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_23653FF04BEF8ECF078A9C31E1F39A64" xlink:to="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_23653FF04BEF8ECF078A9C31E1F39A64" xlink:type="arc"/>
<link:label id="lab_us-gaap_LossContingencyNatureDomain_003A75D602BCF2595D459C31E1F30029_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyNatureDomain_003A75D602BCF2595D459C31E1F30029" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Loss Contingency, Nature [Domain] </link:label>
<link:label id="lab_us-gaap_LossContingencyNatureDomain_003A75D602BCF2595D459C31E1F30029_label_en-US" xlink:label="lab_us-gaap_LossContingencyNatureDomain_003A75D602BCF2595D459C31E1F30029" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Loss Contingency, Nature [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_003A75D602BCF2595D459C31E1F30029" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyNatureDomain_003A75D602BCF2595D459C31E1F30029" xlink:to="lab_us-gaap_LossContingencyNatureDomain_003A75D602BCF2595D459C31E1F30029" xlink:type="arc"/>
<link:label id="lab_us-gaap_GuaranteeOfIndebtednessOfOthersMember_C02359928E0197C824949C31E1F4BBC1_terseLabel_en-US" xlink:label="lab_us-gaap_GuaranteeOfIndebtednessOfOthersMember_C02359928E0197C824949C31E1F4BBC1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Guaranteed Clinic Loan </link:label>
<link:label id="lab_us-gaap_GuaranteeOfIndebtednessOfOthersMember_C02359928E0197C824949C31E1F4BBC1_label_en-US" xlink:label="lab_us-gaap_GuaranteeOfIndebtednessOfOthersMember_C02359928E0197C824949C31E1F4BBC1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Guarantee of Indebtedness of Others [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GuaranteeOfIndebtednessOfOthersMember" xlink:label="loc_us-gaap_GuaranteeOfIndebtednessOfOthersMember_C02359928E0197C824949C31E1F4BBC1" xlink:type="locator"/>
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<link:label id="lab_ara_SecondLienCreditAgreementMember_C9A1EB701F292528FD129C31E1F51AA8_terseLabel_en-US" xlink:label="lab_ara_SecondLienCreditAgreementMember_C9A1EB701F292528FD129C31E1F51AA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Second Lien Credit Agreement </link:label>
<link:label id="lab_ara_SecondLienCreditAgreementMember_C9A1EB701F292528FD129C31E1F51AA8_label_en-US" xlink:label="lab_ara_SecondLienCreditAgreementMember_C9A1EB701F292528FD129C31E1F51AA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Second Lien Credit Agreement [Member] </link:label>
<link:label id="lab_ara_SecondLienCreditAgreementMember_C9A1EB701F292528FD129C31E1F51AA8_documentation_en-US" xlink:label="lab_ara_SecondLienCreditAgreementMember_C9A1EB701F292528FD129C31E1F51AA8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Relates to the Second Lien Credit Agreement. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_SecondLienCreditAgreementMember" xlink:label="loc_ara_SecondLienCreditAgreementMember_C9A1EB701F292528FD129C31E1F51AA8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_SecondLienCreditAgreementMember_C9A1EB701F292528FD129C31E1F51AA8" xlink:to="lab_ara_SecondLienCreditAgreementMember_C9A1EB701F292528FD129C31E1F51AA8" xlink:type="arc"/>
<link:label id="lab_ara_FirstLienCreditAgreementMember_350D2CFD763E293404FA9C31E1F5DF8F_terseLabel_en-US" xlink:label="lab_ara_FirstLienCreditAgreementMember_350D2CFD763E293404FA9C31E1F5DF8F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> First Lien Credit Agreement </link:label>
<link:label id="lab_ara_FirstLienCreditAgreementMember_350D2CFD763E293404FA9C31E1F5DF8F_label_en-US" xlink:label="lab_ara_FirstLienCreditAgreementMember_350D2CFD763E293404FA9C31E1F5DF8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> First Lien Credit Agreement [Member] </link:label>
<link:label id="lab_ara_FirstLienCreditAgreementMember_350D2CFD763E293404FA9C31E1F5DF8F_documentation_en-US" xlink:label="lab_ara_FirstLienCreditAgreementMember_350D2CFD763E293404FA9C31E1F5DF8F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Relates to the First Lien Credit Agreement. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_FirstLienCreditAgreementMember" xlink:label="loc_ara_FirstLienCreditAgreementMember_350D2CFD763E293404FA9C31E1F5DF8F" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_FirstLienCreditAgreementMember_350D2CFD763E293404FA9C31E1F5DF8F" xlink:to="lab_ara_FirstLienCreditAgreementMember_350D2CFD763E293404FA9C31E1F5DF8F" xlink:type="arc"/>
<link:label id="lab_ara_TermLoanHoldingsLLCMember_D851324E1B34C51B06EE9C31E1F640AB_terseLabel_en-US" xlink:label="lab_ara_TermLoanHoldingsLLCMember_D851324E1B34C51B06EE9C31E1F640AB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Term Loan Holdings LLC </link:label>
<link:label id="lab_ara_TermLoanHoldingsLLCMember_D851324E1B34C51B06EE9C31E1F640AB_label_en-US" xlink:label="lab_ara_TermLoanHoldingsLLCMember_D851324E1B34C51B06EE9C31E1F640AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Term Loan Holdings LLC [Member] </link:label>
<link:label id="lab_ara_TermLoanHoldingsLLCMember_D851324E1B34C51B06EE9C31E1F640AB_documentation_en-US" xlink:label="lab_ara_TermLoanHoldingsLLCMember_D851324E1B34C51B06EE9C31E1F640AB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents information pertaining to Term Loan Holdings LLC. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_TermLoanHoldingsLLCMember" xlink:label="loc_ara_TermLoanHoldingsLLCMember_D851324E1B34C51B06EE9C31E1F640AB" xlink:type="locator"/>
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<link:label id="lab_ara_ScheduleofInitialPublicOfferingLineItems_78B0828A9C0A028B89CD9C31E1F6773A_terseLabel_en-US" xlink:label="lab_ara_ScheduleofInitialPublicOfferingLineItems_78B0828A9C0A028B89CD9C31E1F6773A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Initial Public Offering </link:label>
<link:label id="lab_ara_ScheduleofInitialPublicOfferingLineItems_78B0828A9C0A028B89CD9C31E1F6773A_label_en-US" xlink:label="lab_ara_ScheduleofInitialPublicOfferingLineItems_78B0828A9C0A028B89CD9C31E1F6773A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Schedule of Initial Public Offering [Line Items] </link:label>
<link:label id="lab_ara_ScheduleofInitialPublicOfferingLineItems_78B0828A9C0A028B89CD9C31E1F6773A_documentation_en-US" xlink:label="lab_ara_ScheduleofInitialPublicOfferingLineItems_78B0828A9C0A028B89CD9C31E1F6773A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> [Line Items] for Schedule of Initial Public Offering [Table] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_ScheduleofInitialPublicOfferingLineItems" xlink:label="loc_ara_ScheduleofInitialPublicOfferingLineItems_78B0828A9C0A028B89CD9C31E1F6773A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_SharePrice_3EA7F46849FA6C7805FB9C31E1F68399_verboseLabel_en-US" xlink:label="lab_us-gaap_SharePrice_3EA7F46849FA6C7805FB9C31E1F68399" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Share price (in USD per share) </link:label>
<link:label id="lab_us-gaap_SharePrice_3EA7F46849FA6C7805FB9C31E1F68399_label_en-US" xlink:label="lab_us-gaap_SharePrice_3EA7F46849FA6C7805FB9C31E1F68399" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Share Price </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharePrice" xlink:label="loc_us-gaap_SharePrice_3EA7F46849FA6C7805FB9C31E1F68399" xlink:type="locator"/>
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<link:label id="lab_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_7B1C92F3EBC45C20F1EC9C31E1F7C99A_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_7B1C92F3EBC45C20F1EC9C31E1F7C99A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amendment of Certificate of Incorporation </link:label>
<link:label id="lab_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_7B1C92F3EBC45C20F1EC9C31E1F7C99A_label_en-US" xlink:label="lab_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_7B1C92F3EBC45C20F1EC9C31E1F7C99A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="loc_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_7B1C92F3EBC45C20F1EC9C31E1F7C99A" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_EA9A91FAA0C686095D3B9C31E1F747B8_verboseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_EA9A91FAA0C686095D3B9C31E1F747B8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Stock split ratio </link:label>
<link:label id="lab_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_EA9A91FAA0C686095D3B9C31E1F747B8_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_EA9A91FAA0C686095D3B9C31E1F747B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Stockholders' Equity Note, Stock Split, Conversion Ratio </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:label="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_EA9A91FAA0C686095D3B9C31E1F747B8" xlink:type="locator"/>
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<link:label id="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrentAbstract_8BC36111378E7862F2E29C31E1F78929_terseLabel_en-US" xlink:label="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrentAbstract_8BC36111378E7862F2E29C31E1F78929" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Clinic Loan Assignment and Term Loan Holdings LLC Distribution </link:label>
<link:label id="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrentAbstract_8BC36111378E7862F2E29C31E1F78929_label_en-US" xlink:label="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrentAbstract_8BC36111378E7862F2E29C31E1F78929" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Due to Related Parties [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DueToRelatedPartiesCurrentAndNoncurrentAbstract" xlink:label="loc_us-gaap_DueToRelatedPartiesCurrentAndNoncurrentAbstract_8BC36111378E7862F2E29C31E1F78929" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GuaranteeObligationsMaximumExposure_CCE1AD8E31FBD72FFBED9C31E1F87DB8_verboseLabel_en-US" xlink:label="lab_us-gaap_GuaranteeObligationsMaximumExposure_CCE1AD8E31FBD72FFBED9C31E1F87DB8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Assigned clinic loans </link:label>
<link:label id="lab_us-gaap_GuaranteeObligationsMaximumExposure_CCE1AD8E31FBD72FFBED9C31E1F87DB8_label_en-US" xlink:label="lab_us-gaap_GuaranteeObligationsMaximumExposure_CCE1AD8E31FBD72FFBED9C31E1F87DB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Guarantor Obligations, Maximum Exposure, Undiscounted </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_CCE1AD8E31FBD72FFBED9C31E1F87DB8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GuaranteeObligationsMaximumExposure_CCE1AD8E31FBD72FFBED9C31E1F87DB8" xlink:to="lab_us-gaap_GuaranteeObligationsMaximumExposure_CCE1AD8E31FBD72FFBED9C31E1F87DB8" xlink:type="arc"/>
<link:label id="lab_ara_ClinicLoanGuarantee_29928C7D1B27F5F7DEE69C31E1F80CA7_terseLabel_en-US" xlink:label="lab_ara_ClinicLoanGuarantee_29928C7D1B27F5F7DEE69C31E1F80CA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Clinic loan guarantee </link:label>
<link:label id="lab_ara_ClinicLoanGuarantee_29928C7D1B27F5F7DEE69C31E1F80CA7_label_en-US" xlink:label="lab_ara_ClinicLoanGuarantee_29928C7D1B27F5F7DEE69C31E1F80CA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Clinic Loan Guarantee </link:label>
<link:label id="lab_ara_ClinicLoanGuarantee_29928C7D1B27F5F7DEE69C31E1F80CA7_documentation_en-US" xlink:label="lab_ara_ClinicLoanGuarantee_29928C7D1B27F5F7DEE69C31E1F80CA7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents the amount of the assigned clinic loans guaranteed in proportion to the respective ownership interests. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_ClinicLoanGuarantee" xlink:label="loc_ara_ClinicLoanGuarantee_29928C7D1B27F5F7DEE69C31E1F80CA7" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_ClinicLoanGuarantee_29928C7D1B27F5F7DEE69C31E1F80CA7" xlink:to="lab_ara_ClinicLoanGuarantee_29928C7D1B27F5F7DEE69C31E1F80CA7" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseNetAbstract_252C74921944957844099C31E1F99D87_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseNetAbstract_252C74921944957844099C31E1F99D87" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amendments to and Repayment of Credit Facilities, Income Tax Receivable Agreement and Special Dividends and Stock Option Modification </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseNetAbstract_252C74921944957844099C31E1F99D87_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseNetAbstract_252C74921944957844099C31E1F99D87" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Increase (Decrease), Net [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityIncreaseDecreaseNetAbstract" xlink:label="loc_us-gaap_LineOfCreditFacilityIncreaseDecreaseNetAbstract_252C74921944957844099C31E1F99D87" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityIncreaseDecreaseNetAbstract_252C74921944957844099C31E1F99D87" xlink:to="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseNetAbstract_252C74921944957844099C31E1F99D87" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_AA699EE2FB2F86E7AE759C31E1F90945_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_AA699EE2FB2F86E7AE759C31E1F90945" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Increase in borrowing capacity </link:label>
<link:label id="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_AA699EE2FB2F86E7AE759C31E1F90945_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_AA699EE2FB2F86E7AE759C31E1F90945" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Line of Credit Facility, Increase (Decrease), Net </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet" xlink:label="loc_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_AA699EE2FB2F86E7AE759C31E1F90945" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_AA699EE2FB2F86E7AE759C31E1F90945" xlink:to="lab_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_AA699EE2FB2F86E7AE759C31E1F90945" xlink:type="arc"/>
<link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AA9EFDA823147DB61429C31E1F91096_verboseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AA9EFDA823147DB61429C31E1F91096" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Aggregate amount of borrowing capacity </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AA9EFDA823147DB61429C31E1F91096" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AA9EFDA823147DB61429C31E1F91096" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8AA9EFDA823147DB61429C31E1F91096" xlink:type="arc"/>
<link:label id="lab_us-gaap_DebtInstrumentInterestRateIncreaseDecrease_111B450C83525C20D32E9C31E1F91193_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateIncreaseDecrease_111B450C83525C20D32E9C31E1F91193" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Interest rate margin increase </link:label>
<link:label id="lab_us-gaap_DebtInstrumentInterestRateIncreaseDecrease_111B450C83525C20D32E9C31E1F91193_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateIncreaseDecrease_111B450C83525C20D32E9C31E1F91193" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Debt Instrument, Interest Rate, Increase (Decrease) </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateIncreaseDecrease" xlink:label="loc_us-gaap_DebtInstrumentInterestRateIncreaseDecrease_111B450C83525C20D32E9C31E1F91193" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateIncreaseDecrease_111B450C83525C20D32E9C31E1F91193" xlink:to="lab_us-gaap_DebtInstrumentInterestRateIncreaseDecrease_111B450C83525C20D32E9C31E1F91193" xlink:type="arc"/>
<link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_EF8C58C0F83AA58E282C9C31E1F9ED53_verboseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts_EF8C58C0F83AA58E282C9C31E1F9ED53" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds from term loans, net of deferred financing costs </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_EF8C58C0F83AA58E282C9C31E1F9ED53" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDebtIssuanceCosts_EF8C58C0F83AA58E282C9C31E1F9ED53" xlink:to="lab_us-gaap_PaymentsOfDebtIssuanceCosts_EF8C58C0F83AA58E282C9C31E1F9ED53" xlink:type="arc"/>
<link:label id="lab_ara_IncomeTaxReceivableAgreementLiabilityTotal_6E87BE0457BAEE9007419C31E1FA2AD8_verboseLabel_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementLiabilityTotal_6E87BE0457BAEE9007419C31E1FA2AD8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Estimated liability based on fair value of tax receivable agreement </link:label>
<link:label id="lab_ara_IncomeTaxReceivableAgreementLiabilityTotal_6E87BE0457BAEE9007419C31E1FA2AD8_label_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementLiabilityTotal_6E87BE0457BAEE9007419C31E1FA2AD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Receivable Agreement Liability Total </link:label>
<link:label id="lab_ara_IncomeTaxReceivableAgreementLiabilityTotal_6E87BE0457BAEE9007419C31E1FA2AD8_documentation_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementLiabilityTotal_6E87BE0457BAEE9007419C31E1FA2AD8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Income tax receivable agreement liability total </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_IncomeTaxReceivableAgreementLiabilityTotal" xlink:label="loc_ara_IncomeTaxReceivableAgreementLiabilityTotal_6E87BE0457BAEE9007419C31E1FA2AD8" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_IncomeTaxReceivableAgreementLiabilityTotal_6E87BE0457BAEE9007419C31E1FA2AD8" xlink:to="lab_ara_IncomeTaxReceivableAgreementLiabilityTotal_6E87BE0457BAEE9007419C31E1FA2AD8" xlink:type="arc"/>
<link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_04EA27D7756D30EA2E999C31E1FA2BF3_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_04EA27D7756D30EA2E999C31E1FA2BF3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Financial instrument fair value </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_04EA27D7756D30EA2E999C31E1FA2BF3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_04EA27D7756D30EA2E999C31E1FA2BF3" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_04EA27D7756D30EA2E999C31E1FA2BF3" xlink:type="arc"/>
<link:label id="lab_ara_IncomeTaxReceivableAgreementLiabilityCurrent_213CB8B96F58CDF940CF9C31E1FA7500_terseLabel_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementLiabilityCurrent_213CB8B96F58CDF940CF9C31E1FA7500" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accrued but unpaid obligations under tax receivable agreement </link:label>
<link:label id="lab_ara_IncomeTaxReceivableAgreementLiabilityCurrent_213CB8B96F58CDF940CF9C31E1FA7500_label_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementLiabilityCurrent_213CB8B96F58CDF940CF9C31E1FA7500" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Tax Receivable Agreement Liability Current </link:label>
<link:label id="lab_ara_IncomeTaxReceivableAgreementLiabilityCurrent_213CB8B96F58CDF940CF9C31E1FA7500_documentation_en-US" xlink:label="lab_ara_IncomeTaxReceivableAgreementLiabilityCurrent_213CB8B96F58CDF940CF9C31E1FA7500" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Income tax receivable agreement liability current </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_IncomeTaxReceivableAgreementLiabilityCurrent" xlink:label="loc_ara_IncomeTaxReceivableAgreementLiabilityCurrent_213CB8B96F58CDF940CF9C31E1FA7500" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_IncomeTaxReceivableAgreementLiabilityCurrent_213CB8B96F58CDF940CF9C31E1FA7500" xlink:to="lab_ara_IncomeTaxReceivableAgreementLiabilityCurrent_213CB8B96F58CDF940CF9C31E1FA7500" xlink:type="arc"/>
<link:label id="lab_ara_PaymentsOnTaxReceivableAgreement_FBADBF9EA44D9E8A79999C31E1FAA701_terseLabel_en-US" xlink:label="lab_ara_PaymentsOnTaxReceivableAgreement_FBADBF9EA44D9E8A79999C31E1FAA701" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Payments on tax receivable agreement </link:label>
<link:label id="lab_ara_PaymentsOnTaxReceivableAgreement_FBADBF9EA44D9E8A79999C31E1FAA701_label_en-US" xlink:label="lab_ara_PaymentsOnTaxReceivableAgreement_FBADBF9EA44D9E8A79999C31E1FAA701" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Payments On Tax Receivable Agreement </link:label>
<link:label id="lab_ara_PaymentsOnTaxReceivableAgreement_FBADBF9EA44D9E8A79999C31E1FAA701_documentation_en-US" xlink:label="lab_ara_PaymentsOnTaxReceivableAgreement_FBADBF9EA44D9E8A79999C31E1FAA701" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Payments On Tax Receivable Agreement </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_PaymentsOnTaxReceivableAgreement" xlink:label="loc_ara_PaymentsOnTaxReceivableAgreement_FBADBF9EA44D9E8A79999C31E1FAA701" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_PaymentsOnTaxReceivableAgreement_FBADBF9EA44D9E8A79999C31E1FAA701" xlink:to="lab_ara_PaymentsOnTaxReceivableAgreement_FBADBF9EA44D9E8A79999C31E1FAA701" xlink:type="arc"/>
<link:label id="lab_ara_DividendsCashPerShare_CF1B70A8BE8EB31371779C31E1FB4446_terseLabel_en-US" xlink:label="lab_ara_DividendsCashPerShare_CF1B70A8BE8EB31371779C31E1FB4446" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash dividend (in dollars per share) </link:label>
<link:label id="lab_ara_DividendsCashPerShare_CF1B70A8BE8EB31371779C31E1FB4446_label_en-US" xlink:label="lab_ara_DividendsCashPerShare_CF1B70A8BE8EB31371779C31E1FB4446" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Dividends Cash Per Share </link:label>
<link:label id="lab_ara_DividendsCashPerShare_CF1B70A8BE8EB31371779C31E1FB4446_documentation_en-US" xlink:label="lab_ara_DividendsCashPerShare_CF1B70A8BE8EB31371779C31E1FB4446" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of paid and unpaid common stock dividends declared with the form of settlement in cash (in dollars per share). </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_DividendsCashPerShare" xlink:label="loc_ara_DividendsCashPerShare_CF1B70A8BE8EB31371779C31E1FB4446" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_DividendsCashPerShare_CF1B70A8BE8EB31371779C31E1FB4446" xlink:to="lab_ara_DividendsCashPerShare_CF1B70A8BE8EB31371779C31E1FB4446" xlink:type="arc"/>
<link:label id="lab_us-gaap_DividendsCash_A811ADB8F0E7AD44FC6C9C31E1FB6CBA_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsCash_A811ADB8F0E7AD44FC6C9C31E1FB6CBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Cash dividends declared per share (in USD per share) </link:label>
<link:label id="lab_us-gaap_DividendsCash_A811ADB8F0E7AD44FC6C9C31E1FB6CBA_label_en-US" xlink:label="lab_us-gaap_DividendsCash_A811ADB8F0E7AD44FC6C9C31E1FB6CBA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Dividends, Cash </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsCash" xlink:label="loc_us-gaap_DividendsCash_A811ADB8F0E7AD44FC6C9C31E1FB6CBA" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsCash_A811ADB8F0E7AD44FC6C9C31E1FB6CBA" xlink:to="lab_us-gaap_DividendsCash_A811ADB8F0E7AD44FC6C9C31E1FB6CBA" xlink:type="arc"/>
<link:label id="lab_ara_EquitableAdjustmentCashDividendEquivalentPaymentPerShare_69E8A245431BB703A80D9C31E1FB898E_terseLabel_en-US" xlink:label="lab_ara_EquitableAdjustmentCashDividendEquivalentPaymentPerShare_69E8A245431BB703A80D9C31E1FB898E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Equivalent adjustments in the form of cash dividend equivalent payments (in dollars per share) </link:label>
<link:label id="lab_ara_EquitableAdjustmentCashDividendEquivalentPaymentPerShare_69E8A245431BB703A80D9C31E1FB898E_label_en-US" xlink:label="lab_ara_EquitableAdjustmentCashDividendEquivalentPaymentPerShare_69E8A245431BB703A80D9C31E1FB898E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Equitable Adjustment Cash Dividend Equivalent Payment Per Share </link:label>
<link:label id="lab_ara_EquitableAdjustmentCashDividendEquivalentPaymentPerShare_69E8A245431BB703A80D9C31E1FB898E_documentation_en-US" xlink:label="lab_ara_EquitableAdjustmentCashDividendEquivalentPaymentPerShare_69E8A245431BB703A80D9C31E1FB898E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents dividend equivalent payments on certain stock options per share amount. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_EquitableAdjustmentCashDividendEquivalentPaymentPerShare" xlink:label="loc_ara_EquitableAdjustmentCashDividendEquivalentPaymentPerShare_69E8A245431BB703A80D9C31E1FB898E" xlink:type="locator"/>
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<link:label id="lab_ara_EquitableAdjustmentCashDividendEquivalentPayment_EC08FF2D4FF98FD4CF7E9C31E1FB34BA_terseLabel_en-US" xlink:label="lab_ara_EquitableAdjustmentCashDividendEquivalentPayment_EC08FF2D4FF98FD4CF7E9C31E1FB34BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Equitable adjustments in the form of cash dividend equivalent payments </link:label>
<link:label id="lab_ara_EquitableAdjustmentCashDividendEquivalentPayment_EC08FF2D4FF98FD4CF7E9C31E1FB34BA_label_en-US" xlink:label="lab_ara_EquitableAdjustmentCashDividendEquivalentPayment_EC08FF2D4FF98FD4CF7E9C31E1FB34BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Equitable Adjustment Cash Dividend Equivalent Payment </link:label>
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<link:label id="lab_us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries_342D5E1DE3C63AABF381D48E71A52CE1_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries_342D5E1DE3C63AABF381D48E71A52CE1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Proceeds from sale of dialysis clinics </link:label>
<link:label id="lab_us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries_342D5E1DE3C63AABF381D48E71A52CE1_label_en-US" xlink:label="lab_us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries_342D5E1DE3C63AABF381D48E71A52CE1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Proceeds from Divestiture of Interest in Consolidated Subsidiaries </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries_342D5E1DE3C63AABF381D48E71A52CE1" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GainLossOnSaleOfBusiness_C899BB5DD8CCB0307F97D48E71A555DA_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfBusiness_C899BB5DD8CCB0307F97D48E71A555DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Gain (Loss) on Disposition of Business </link:label>
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<link:label id="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_3C9FF486EA6E79661C37D3C18428AFC4_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal_3C9FF486EA6E79661C37D3C18428AFC4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Tax Assets, Operating Loss Carryforwards, State and Local </link:label>
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<link:label id="lab_us-gaap_DeferredTaxAssetsCharitableContributionCarryforwards_89A4E7FEA556A7A21010D3C1842942BB_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsCharitableContributionCarryforwards_89A4E7FEA556A7A21010D3C1842942BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Deferred Tax Assets, Charitable Contribution Carryforwards </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsCharitableContributionCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsCharitableContributionCarryforwards_89A4E7FEA556A7A21010D3C1842942BB" xlink:type="locator"/>
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<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_B07932E92F8DC4D26EB6D3C18429CB10" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_58CF04EDF161E44E98ECD3C18429B3B6_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_58CF04EDF161E44E98ECD3C18429B3B6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Valuation allowance, deferred tax asset, increase (decrease) </link:label>
<link:label id="lab_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_58CF04EDF161E44E98ECD3C18429B3B6_label_en-US" xlink:label="lab_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_58CF04EDF161E44E98ECD3C18429B3B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount </link:label>
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<link:label id="lab_ara_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseCharitableContributions_E46122820079B9A14A13D3C18429A81C_terseLabel_en-US" xlink:label="lab_ara_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseCharitableContributions_E46122820079B9A14A13D3C18429A81C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Valuation allowance, deferred tax asset, increase, charitable contributions </link:label>
<link:label id="lab_ara_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseCharitableContributions_E46122820079B9A14A13D3C18429A81C_label_en-US" xlink:label="lab_ara_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseCharitableContributions_E46122820079B9A14A13D3C18429A81C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Charitable Contributions </link:label>
<link:label id="lab_ara_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseCharitableContributions_E46122820079B9A14A13D3C18429A81C_documentation_en-US" xlink:label="lab_ara_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseCharitableContributions_E46122820079B9A14A13D3C18429A81C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Charitable Contributions </link:label>
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<link:label id="lab_ara_NumberOfDialysisCenters_7BE3FFA2A2AC3FA34778B570E2141307_label_en-US" xlink:label="lab_ara_NumberOfDialysisCenters_7BE3FFA2A2AC3FA34778B570E2141307" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Number Of Dialysis Centers </link:label>
<link:label id="lab_ara_NumberOfDialysisCenters_7BE3FFA2A2AC3FA34778B570E2141307_documentation_en-US" xlink:label="lab_ara_NumberOfDialysisCenters_7BE3FFA2A2AC3FA34778B570E2141307" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents the number of dialysis centers. </link:label>
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<link:label id="lab_ara_NumberOfBusinessesAcquiredNotOperationalPriorToAcquisition_170A38F6E697906FFB7DB570E2155BE3_terseLabel_en-US" xlink:label="lab_ara_NumberOfBusinessesAcquiredNotOperationalPriorToAcquisition_170A38F6E697906FFB7DB570E2155BE3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of dialysis centers not operational prior to acquisition </link:label>
<link:label id="lab_ara_NumberOfBusinessesAcquiredNotOperationalPriorToAcquisition_170A38F6E697906FFB7DB570E2155BE3_label_en-US" xlink:label="lab_ara_NumberOfBusinessesAcquiredNotOperationalPriorToAcquisition_170A38F6E697906FFB7DB570E2155BE3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Number Of Businesses Acquired, Not Operational Prior To Acquisition </link:label>
<link:label id="lab_ara_NumberOfBusinessesAcquiredNotOperationalPriorToAcquisition_170A38F6E697906FFB7DB570E2155BE3_documentation_en-US" xlink:label="lab_ara_NumberOfBusinessesAcquiredNotOperationalPriorToAcquisition_170A38F6E697906FFB7DB570E2155BE3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Number Of Businesses Acquired, Not Operational Prior To Acquisition </link:label>
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<link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_59CD7C9B4E7EE48F6AD8B570E2156919_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_59CD7C9B4E7EE48F6AD8B570E2156919" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] </link:label>
<link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_59CD7C9B4E7EE48F6AD8B570E2156919_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_59CD7C9B4E7EE48F6AD8B570E2156919" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] </link:label>
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<link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_E68182568F3B2DC0733EB570E2151E71_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_E68182568F3B2DC0733EB570E2151E71" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and equipment </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_E68182568F3B2DC0733EB570E2151E71" xlink:type="locator"/>
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<link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_BE936BD63839B6AC604EB570E215C249_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_BE936BD63839B6AC604EB570E215C249" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Noncompete agreements </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_BE936BD63839B6AC604EB570E215C249" xlink:type="locator"/>
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<link:label id="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_B5A10E9FEBC97AC99480958D86295B11_label_en-US" xlink:label="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_B5A10E9FEBC97AC99480958D86295B11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Statement of Comprehensive Income [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_B5A10E9FEBC97AC99480958D86295B11" xlink:type="locator"/>
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<link:label id="lab_us-gaap_IncomeStatementAbstract_A4FC2104823670281F9BD9AD5F7E7694_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract_A4FC2104823670281F9BD9AD5F7E7694" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Income Statement [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_A4FC2104823670281F9BD9AD5F7E7694" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GainOnBusinessInterruptionInsuranceRecovery_A70392CDE177CC6B6021D9AD5F84431E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainOnBusinessInterruptionInsuranceRecovery_A70392CDE177CC6B6021D9AD5F84431E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US"> Gain on business interruption insurance </link:label>
<link:label id="lab_us-gaap_GainOnBusinessInterruptionInsuranceRecovery_A70392CDE177CC6B6021D9AD5F84431E_label_en-US" xlink:label="lab_us-gaap_GainOnBusinessInterruptionInsuranceRecovery_A70392CDE177CC6B6021D9AD5F84431E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Gain on Business Interruption Insurance Recovery </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainOnBusinessInterruptionInsuranceRecovery" xlink:label="loc_us-gaap_GainOnBusinessInterruptionInsuranceRecovery_A70392CDE177CC6B6021D9AD5F84431E" xlink:type="locator"/>
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<link:label id="lab_ara_LegalFeesAndOther_3077D8A270767B96FE97D9AD5F846406_verboseLabel_en-US" xlink:label="lab_ara_LegalFeesAndOther_3077D8A270767B96FE97D9AD5F846406" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Certain legal and other matters </link:label>
<link:label id="lab_ara_LegalFeesAndOther_3077D8A270767B96FE97D9AD5F846406_label_en-US" xlink:label="lab_ara_LegalFeesAndOther_3077D8A270767B96FE97D9AD5F846406" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Legal Fees And Other </link:label>
<link:label id="lab_ara_LegalFeesAndOther_3077D8A270767B96FE97D9AD5F846406_documentation_en-US" xlink:label="lab_ara_LegalFeesAndOther_3077D8A270767B96FE97D9AD5F846406" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Legal Fees And Other </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_LegalFeesAndOther" xlink:label="loc_ara_LegalFeesAndOther_3077D8A270767B96FE97D9AD5F846406" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ara_LegalFeesAndOther_3077D8A270767B96FE97D9AD5F846406" xlink:to="lab_ara_LegalFeesAndOther_3077D8A270767B96FE97D9AD5F846406" xlink:type="arc"/>
<link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_E06F03DB2DDB976DC1AED9AD5F85BA9E_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_E06F03DB2DDB976DC1AED9AD5F85BA9E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income tax expense </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_E06F03DB2DDB976DC1AED9AD5F85BA9E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_EarningsPerShareAbstract_177D51A31DAD562ABAEDD9AD5F863B04_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_177D51A31DAD562ABAEDD9AD5F863B04" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Loss per share: </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_177D51A31DAD562ABAEDD9AD5F863B04" xlink:type="locator"/>
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<link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_00B3B6ED52AF5BA5336AD9AD5F87E2A9_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_00B3B6ED52AF5BA5336AD9AD5F87E2A9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Weighted-average number of common shares outstanding </link:label>
<link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_00B3B6ED52AF5BA5336AD9AD5F87E2A9_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_00B3B6ED52AF5BA5336AD9AD5F87E2A9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Weighted Average Number of Shares Outstanding, Diluted [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_00B3B6ED52AF5BA5336AD9AD5F87E2A9" xlink:type="locator"/>
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<link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_6F43E5AA9A8C1DA4E002958D84248529_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_6F43E5AA9A8C1DA4E002958D84248529" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Income tax provision at federal statutory rate </link:label>
<link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_6F43E5AA9A8C1DA4E002958D84248529_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_6F43E5AA9A8C1DA4E002958D84248529" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_6F43E5AA9A8C1DA4E002958D84248529" xlink:type="locator"/>
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<link:label id="lab_ara_IncreaseDecreaseInEffectiveIncomeTaxRateReconciliationPercentAbstract_2B0AB05DC3426D3AFCED958D842456BB_terseLabel_en-US" xlink:label="lab_ara_IncreaseDecreaseInEffectiveIncomeTaxRateReconciliationPercentAbstract_2B0AB05DC3426D3AFCED958D842456BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Increase (decrease) in tax resulting from: </link:label>
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<link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_23FD91C8FD41CEEE7277958D84249BA3_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_23FD91C8FD41CEEE7277958D84249BA3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> State taxes, net of federal benefit </link:label>
<link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_23FD91C8FD41CEEE7277958D84249BA3_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_23FD91C8FD41CEEE7277958D84249BA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_23FD91C8FD41CEEE7277958D84249BA3" xlink:type="locator"/>
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<link:label id="lab_us-gaap_VariableInterestEntityDisclosureTextBlock_D2629E37C44BC34091D9958D84B6EB80_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityDisclosureTextBlock_D2629E37C44BC34091D9958D84B6EB80" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Variable Interest Entities </link:label>
<link:label id="lab_us-gaap_VariableInterestEntityDisclosureTextBlock_D2629E37C44BC34091D9958D84B6EB80_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityDisclosureTextBlock_D2629E37C44BC34091D9958D84B6EB80" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Variable Interest Entity Disclosure [Text Block] </link:label>
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<link:label id="lab_ara_NoncontrollingInterestIncreaseDecreaseFromSaleOfParentEquityInterest_F31DA3ED1713B250E64B958D84A80479_verboseLabel_en-US" xlink:label="lab_ara_NoncontrollingInterestIncreaseDecreaseFromSaleOfParentEquityInterest_F31DA3ED1713B250E64B958D84A80479" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> (Decrease) increase in paid-in capital for the sales of noncontrolling interest </link:label>
<link:label id="lab_ara_NoncontrollingInterestIncreaseDecreaseFromSaleOfParentEquityInterest_F31DA3ED1713B250E64B958D84A80479_label_en-US" xlink:label="lab_ara_NoncontrollingInterestIncreaseDecreaseFromSaleOfParentEquityInterest_F31DA3ED1713B250E64B958D84A80479" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest, Increase (Decrease) From Sale Of Parent Equity Interest </link:label>
<link:label id="lab_ara_NoncontrollingInterestIncreaseDecreaseFromSaleOfParentEquityInterest_F31DA3ED1713B250E64B958D84A80479_documentation_en-US" xlink:label="lab_ara_NoncontrollingInterestIncreaseDecreaseFromSaleOfParentEquityInterest_F31DA3ED1713B250E64B958D84A80479" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest, Increase (Decrease) From Sale Of Parent Equity Interest </link:label>
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<link:label id="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_B8DC05AA2AE5699604E7958D84A8DC04_negatedNetLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_B8DC05AA2AE5699604E7958D84A8DC04" xlink:role="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="resource" xml:lang="en-US"> Decrease in paid-in capital for the purchase of noncontrolling interest and adjustments to ownership interest </link:label>
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<link:label id="lab_ara_NoncontrollingInterestNetTransfers_7405AE129A57972322BD958D84A83735_negatedTotalLabel_en-US" xlink:label="lab_ara_NoncontrollingInterestNetTransfers_7405AE129A57972322BD958D84A83735" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US"> Net transfers to noncontrolling interests </link:label>
<link:label id="lab_ara_NoncontrollingInterestNetTransfers_7405AE129A57972322BD958D84A83735_label_en-US" xlink:label="lab_ara_NoncontrollingInterestNetTransfers_7405AE129A57972322BD958D84A83735" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Noncontrolling Interest, Net Transfers </link:label>
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<link:label id="lab_ara_NetIncomeLossAttributableToParentNetOfTransfersToNoncontrollingInterest_9F3C5FD0C3C26B4A1CE1958D84A8C776_totalLabel_en-US" xlink:label="lab_ara_NetIncomeLossAttributableToParentNetOfTransfersToNoncontrollingInterest_9F3C5FD0C3C26B4A1CE1958D84A8C776" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US"> Net loss attributable to American Renal Associates Holdings, Inc., net of transfers to noncontrolling interests </link:label>
<link:label id="lab_ara_NetIncomeLossAttributableToParentNetOfTransfersToNoncontrollingInterest_9F3C5FD0C3C26B4A1CE1958D84A8C776_label_en-US" xlink:label="lab_ara_NetIncomeLossAttributableToParentNetOfTransfersToNoncontrollingInterest_9F3C5FD0C3C26B4A1CE1958D84A8C776" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Net Income (Loss) Attributable to Parent Net of Transfers to Noncontrolling Interest </link:label>
<link:label id="lab_ara_NetIncomeLossAttributableToParentNetOfTransfersToNoncontrollingInterest_9F3C5FD0C3C26B4A1CE1958D84A8C776_documentation_en-US" xlink:label="lab_ara_NetIncomeLossAttributableToParentNetOfTransfersToNoncontrollingInterest_9F3C5FD0C3C26B4A1CE1958D84A8C776" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of Net Income (Loss) attributable to parent net of transfers to noncontrolling interest. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_NetIncomeLossAttributableToParentNetOfTransfersToNoncontrollingInterest" xlink:label="loc_ara_NetIncomeLossAttributableToParentNetOfTransfersToNoncontrollingInterest_9F3C5FD0C3C26B4A1CE1958D84A8C776" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_E535B400AB596BDF80F3D3BBDB27600D_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis_E535B400AB596BDF80F3D3BBDB27600D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Concentration Risk Type [Axis] </link:label>
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<link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_3C330DE33F6216E387B1D3BBDB27BBB2_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain_3C330DE33F6216E387B1D3BBDB27BBB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Concentration Risk Type [Domain] </link:label>
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<link:label id="lab_us-gaap_CustomerConcentrationRiskMember_A4DFCB825863FB2974D9D3BBDB28E790_terseLabel_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember_A4DFCB825863FB2974D9D3BBDB28E790" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Customer Concentration Risk </link:label>
<link:label id="lab_us-gaap_CustomerConcentrationRiskMember_A4DFCB825863FB2974D9D3BBDB28E790_label_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember_A4DFCB825863FB2974D9D3BBDB28E790" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Customer Concentration Risk [Member] </link:label>
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<link:label id="lab_srt_MajorCustomersAxis_B849D414844707530DBDD3BBDB28F7EE_terseLabel_en-US" xlink:label="lab_srt_MajorCustomersAxis_B849D414844707530DBDD3BBDB28F7EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Customer [Axis] </link:label>
<link:label id="lab_srt_MajorCustomersAxis_B849D414844707530DBDD3BBDB28F7EE_label_en-US" xlink:label="lab_srt_MajorCustomersAxis_B849D414844707530DBDD3BBDB28F7EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Customer [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_B849D414844707530DBDD3BBDB28F7EE" xlink:type="locator"/>
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<link:label id="lab_srt_NameOfMajorCustomerDomain_7B672621037F2CC7F2FDD3BBDB2DB71E_terseLabel_en-US" xlink:label="lab_srt_NameOfMajorCustomerDomain_7B672621037F2CC7F2FDD3BBDB2DB71E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Customer [Domain] </link:label>
<link:label id="lab_srt_NameOfMajorCustomerDomain_7B672621037F2CC7F2FDD3BBDB2DB71E_label_en-US" xlink:label="lab_srt_NameOfMajorCustomerDomain_7B672621037F2CC7F2FDD3BBDB2DB71E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Customer [Domain] </link:label>
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<link:label id="lab_ara_MedicareAndMedicaidProgramsMember_74FF1AF4B7DDCC140C41D3BBDB2EB932_terseLabel_en-US" xlink:label="lab_ara_MedicareAndMedicaidProgramsMember_74FF1AF4B7DDCC140C41D3BBDB2EB932" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Medicare And Medicaid Programs </link:label>
<link:label id="lab_ara_MedicareAndMedicaidProgramsMember_74FF1AF4B7DDCC140C41D3BBDB2EB932_label_en-US" xlink:label="lab_ara_MedicareAndMedicaidProgramsMember_74FF1AF4B7DDCC140C41D3BBDB2EB932" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Medicare And Medicaid Programs [Member] </link:label>
<link:label id="lab_ara_MedicareAndMedicaidProgramsMember_74FF1AF4B7DDCC140C41D3BBDB2EB932_documentation_en-US" xlink:label="lab_ara_MedicareAndMedicaidProgramsMember_74FF1AF4B7DDCC140C41D3BBDB2EB932" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Medicare And Medicaid Programs [Member] </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_MedicareAndMedicaidProgramsMember" xlink:label="loc_ara_MedicareAndMedicaidProgramsMember_74FF1AF4B7DDCC140C41D3BBDB2EB932" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AccountsReceivableMember_F3104BEA98790007A9F7D3BBDB2E6A19_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableMember_F3104BEA98790007A9F7D3BBDB2E6A19" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accounts Receivable </link:label>
<link:label id="lab_us-gaap_AccountsReceivableMember_F3104BEA98790007A9F7D3BBDB2E6A19_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableMember_F3104BEA98790007A9F7D3BBDB2E6A19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Receivable [Member] </link:label>
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<link:label id="lab_us-gaap_RetainedEarningsMember_4B5A3A8B8A63A659BAE8D3BBDB2E110C_verboseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_4B5A3A8B8A63A659BAE8D3BBDB2E110C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Retained Earnings </link:label>
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<link:label id="lab_srt_StatementGeographicalAxis_074DCB33BA7D85876033D3BBDB2F9E58_terseLabel_en-US" xlink:label="lab_srt_StatementGeographicalAxis_074DCB33BA7D85876033D3BBDB2F9E58" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Geographical [Axis] </link:label>
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<link:label id="lab_stpr_FL_6EE47E6195D475928233D3BBDB2F6AE0_terseLabel_en-US" xlink:label="lab_stpr_FL_6EE47E6195D475928233D3BBDB2F6AE0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> FLORIDA </link:label>
<link:label id="lab_stpr_FL_6EE47E6195D475928233D3BBDB2F6AE0_label_en-US" xlink:label="lab_stpr_FL_6EE47E6195D475928233D3BBDB2F6AE0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> FLORIDA </link:label>
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<link:label id="lab_stpr_TX_EB96C98DB09C7398D7EDD3BBDB30D688_terseLabel_en-US" xlink:label="lab_stpr_TX_EB96C98DB09C7398D7EDD3BBDB30D688" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> TEXAS </link:label>
<link:label id="lab_stpr_TX_EB96C98DB09C7398D7EDD3BBDB30D688_label_en-US" xlink:label="lab_stpr_TX_EB96C98DB09C7398D7EDD3BBDB30D688" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> TEXAS </link:label>
<link:loc xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_TX" xlink:label="loc_stpr_TX_EB96C98DB09C7398D7EDD3BBDB30D688" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_stpr_TX_EB96C98DB09C7398D7EDD3BBDB30D688" xlink:to="lab_stpr_TX_EB96C98DB09C7398D7EDD3BBDB30D688" xlink:type="arc"/>
<link:label id="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_2D889B8CD9F768511C0DD3BBDB302A08_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_2D889B8CD9F768511C0DD3BBDB302A08" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Adjustments for New Accounting Pronouncements [Axis] </link:label>
<link:label id="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_2D889B8CD9F768511C0DD3BBDB302A08_label_en-US" xlink:label="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_2D889B8CD9F768511C0DD3BBDB302A08" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Adjustments for New Accounting Pronouncements [Axis] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_2D889B8CD9F768511C0DD3BBDB302A08" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_2D889B8CD9F768511C0DD3BBDB302A08" xlink:to="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_2D889B8CD9F768511C0DD3BBDB302A08" xlink:type="arc"/>
<link:label id="lab_us-gaap_TypeOfAdoptionMember_7316D2C5B0A099F4AC24D3BBDB3039C4_terseLabel_en-US" xlink:label="lab_us-gaap_TypeOfAdoptionMember_7316D2C5B0A099F4AC24D3BBDB3039C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Type of Adoption [Domain] </link:label>
<link:label id="lab_us-gaap_TypeOfAdoptionMember_7316D2C5B0A099F4AC24D3BBDB3039C4_label_en-US" xlink:label="lab_us-gaap_TypeOfAdoptionMember_7316D2C5B0A099F4AC24D3BBDB3039C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Type of Adoption [Domain] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_7316D2C5B0A099F4AC24D3BBDB3039C4" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TypeOfAdoptionMember_7316D2C5B0A099F4AC24D3BBDB3039C4" xlink:to="lab_us-gaap_TypeOfAdoptionMember_7316D2C5B0A099F4AC24D3BBDB3039C4" xlink:type="arc"/>
<link:label id="lab_us-gaap_AccountingStandardsUpdate201602Member_05ABC8A9D300F5A7BB17D3BBDB300DBC_terseLabel_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201602Member_05ABC8A9D300F5A7BB17D3BBDB300DBC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accounting Standards Update 2016-02 </link:label>
<link:label id="lab_us-gaap_AccountingStandardsUpdate201602Member_05ABC8A9D300F5A7BB17D3BBDB300DBC_label_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201602Member_05ABC8A9D300F5A7BB17D3BBDB300DBC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounting Standards Update 2016-02 [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201602Member_05ABC8A9D300F5A7BB17D3BBDB300DBC" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_9C4EEC7CAE3A88F1C510D3BBDB3201FA_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_9C4EEC7CAE3A88F1C510D3BBDB3201FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Included in prepaids and other assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_9C4EEC7CAE3A88F1C510D3BBDB3201FA" xlink:type="locator"/>
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<link:label id="lab_us-gaap_OtherNoncurrentAssetsMember_AC3DB2E9DEFA27EDF60FD3BBDB3247D3_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNoncurrentAssetsMember_AC3DB2E9DEFA27EDF60FD3BBDB3247D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Included in other current assets </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncurrentAssetsMember" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_AC3DB2E9DEFA27EDF60FD3BBDB3247D3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNoncurrentAssetsMember_AC3DB2E9DEFA27EDF60FD3BBDB3247D3" xlink:to="lab_us-gaap_OtherNoncurrentAssetsMember_AC3DB2E9DEFA27EDF60FD3BBDB3247D3" xlink:type="arc"/>
<link:label id="lab_us-gaap_BuildingMember_8376ED96E2548B9CB93CD3BBDB33CD3B_terseLabel_en-US" xlink:label="lab_us-gaap_BuildingMember_8376ED96E2548B9CB93CD3BBDB33CD3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Buildings </link:label>
<link:label id="lab_us-gaap_BuildingMember_8376ED96E2548B9CB93CD3BBDB33CD3B_label_en-US" xlink:label="lab_us-gaap_BuildingMember_8376ED96E2548B9CB93CD3BBDB33CD3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Building [Member] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_8376ED96E2548B9CB93CD3BBDB33CD3B" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BuildingMember_8376ED96E2548B9CB93CD3BBDB33CD3B" xlink:to="lab_us-gaap_BuildingMember_8376ED96E2548B9CB93CD3BBDB33CD3B" xlink:type="arc"/>
<link:label id="lab_us-gaap_SegmentReportingAbstract_5D07D29693C2F3F5C4E3D3BBDB3A2508_verboseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract_5D07D29693C2F3F5C4E3D3BBDB3A2508" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Segment Information </link:label>
<link:label id="lab_us-gaap_SegmentReportingAbstract_5D07D29693C2F3F5C4E3D3BBDB3A2508_label_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract_5D07D29693C2F3F5C4E3D3BBDB3A2508" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Segment Reporting [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_5D07D29693C2F3F5C4E3D3BBDB3A2508" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D07D29693C2F3F5C4E3D3BBDB3A2508" xlink:to="lab_us-gaap_SegmentReportingAbstract_5D07D29693C2F3F5C4E3D3BBDB3A2508" xlink:type="arc"/>
<link:label id="lab_us-gaap_NumberOfReportableSegments_C369EDA9124135AFC105D3BBDB3B915A_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_C369EDA9124135AFC105D3BBDB3B915A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of reportable segments </link:label>
<link:label id="lab_us-gaap_NumberOfReportableSegments_C369EDA9124135AFC105D3BBDB3B915A_label_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_C369EDA9124135AFC105D3BBDB3B915A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Number of Reportable Segments </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_C369EDA9124135AFC105D3BBDB3B915A" xlink:type="locator"/>
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<link:label id="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimateOtherthanStandardBilling_551DB4398DAF4CC614E0D3BBDB3B13D0_terseLabel_en-US" xlink:label="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimateOtherthanStandardBilling_551DB4398DAF4CC614E0D3BBDB3B13D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Medicare recovery claims, other than standard </link:label>
<link:label id="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimateOtherthanStandardBilling_551DB4398DAF4CC614E0D3BBDB3B13D0_label_en-US" xlink:label="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimateOtherthanStandardBilling_551DB4398DAF4CC614E0D3BBDB3B13D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Health Care Organization Patient Service Revenue Estimate, Other than Standard Billing </link:label>
<link:label id="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimateOtherthanStandardBilling_551DB4398DAF4CC614E0D3BBDB3B13D0_documentation_en-US" xlink:label="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimateOtherthanStandardBilling_551DB4398DAF4CC614E0D3BBDB3B13D0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Health Care Organization Patient Service Revenue Estimate, Other than Standard Billing </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_HealthCareOrganizationPatientServiceRevenueEstimateOtherthanStandardBilling" xlink:label="loc_ara_HealthCareOrganizationPatientServiceRevenueEstimateOtherthanStandardBilling_551DB4398DAF4CC614E0D3BBDB3B13D0" xlink:type="locator"/>
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<link:label id="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimate_83510EC387DB4DEBAF7ED3BBDB3CED15_verboseLabel_en-US" xlink:label="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimate_83510EC387DB4DEBAF7ED3BBDB3CED15" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Medicare recovery claims </link:label>
<link:label id="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimate_83510EC387DB4DEBAF7ED3BBDB3CED15_label_en-US" xlink:label="lab_ara_HealthCareOrganizationPatientServiceRevenueEstimate_83510EC387DB4DEBAF7ED3BBDB3CED15" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Health Care Organization Patient Service Revenue Estimate </link:label>
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<link:label id="lab_us-gaap_AccountsReceivableNetAbstract_FDF1E8A62C0B2B9D08CBD3BBDB3C98B8_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetAbstract_FDF1E8A62C0B2B9D08CBD3BBDB3C98B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Accounts Receivable </link:label>
<link:label id="lab_us-gaap_AccountsReceivableNetAbstract_FDF1E8A62C0B2B9D08CBD3BBDB3C98B8_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetAbstract_FDF1E8A62C0B2B9D08CBD3BBDB3C98B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Accounts Receivable, after Allowance for Credit Loss [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetAbstract" xlink:label="loc_us-gaap_AccountsReceivableNetAbstract_FDF1E8A62C0B2B9D08CBD3BBDB3C98B8" xlink:type="locator"/>
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<link:label id="lab_ara_RevenueNumberOfRemainingPerformanceObligation_D1C5C885858BB6250CAFD3BBDB3C231B_terseLabel_en-US" xlink:label="lab_ara_RevenueNumberOfRemainingPerformanceObligation_D1C5C885858BB6250CAFD3BBDB3C231B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of remaining performance obligations </link:label>
<link:label id="lab_ara_RevenueNumberOfRemainingPerformanceObligation_D1C5C885858BB6250CAFD3BBDB3C231B_label_en-US" xlink:label="lab_ara_RevenueNumberOfRemainingPerformanceObligation_D1C5C885858BB6250CAFD3BBDB3C231B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Revenue, Number Of Remaining Performance Obligation </link:label>
<link:label id="lab_ara_RevenueNumberOfRemainingPerformanceObligation_D1C5C885858BB6250CAFD3BBDB3C231B_documentation_en-US" xlink:label="lab_ara_RevenueNumberOfRemainingPerformanceObligation_D1C5C885858BB6250CAFD3BBDB3C231B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Revenue, Number Of Remaining Performance Obligation </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_RevenueNumberOfRemainingPerformanceObligation" xlink:label="loc_ara_RevenueNumberOfRemainingPerformanceObligation_D1C5C885858BB6250CAFD3BBDB3C231B" xlink:type="locator"/>
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<link:label id="lab_ara_PercentageOfReceivableUnderGovernmentsBundledPaymentSystem_F65C6AB81DED477ED5CDD3BBDB3CE65F_terseLabel_en-US" xlink:label="lab_ara_PercentageOfReceivableUnderGovernmentsBundledPaymentSystem_F65C6AB81DED477ED5CDD3BBDB3CE65F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Payment received under government’s bundled payment system </link:label>
<link:label id="lab_ara_PercentageOfReceivableUnderGovernmentsBundledPaymentSystem_F65C6AB81DED477ED5CDD3BBDB3CE65F_label_en-US" xlink:label="lab_ara_PercentageOfReceivableUnderGovernmentsBundledPaymentSystem_F65C6AB81DED477ED5CDD3BBDB3CE65F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Percentage Of Receivable under Government’s Bundled Payment System </link:label>
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<link:loc xlink:href="ara-20181231.xsd#ara_PercentageOfReceivableUnderGovernmentsBundledPaymentSystem" xlink:label="loc_ara_PercentageOfReceivableUnderGovernmentsBundledPaymentSystem_F65C6AB81DED477ED5CDD3BBDB3CE65F" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_24AD12EC58EF59CB235ED3BBDB3C681E_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_24AD12EC58EF59CB235ED3BBDB3C681E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Revenue related to adjustments arising from a change in the transaction price </link:label>
<link:label id="lab_us-gaap_ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_24AD12EC58EF59CB235ED3BBDB3C681E_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_24AD12EC58EF59CB235ED3BBDB3C681E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress" xlink:label="loc_us-gaap_ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress_24AD12EC58EF59CB235ED3BBDB3C681E" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ConcentrationRiskPercentage1_1B2FAFA52DF18C8841A6D3BBDB3C5DFA_verboseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1_1B2FAFA52DF18C8841A6D3BBDB3C5DFA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US"> Patient accounts receivable from Medicare and Medicaid programs </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_1B2FAFA52DF18C8841A6D3BBDB3C5DFA" xlink:type="locator"/>
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<link:label id="lab_ara_PercentageOfAccountsReceivableOfTotalPatient_261BAB87250B1500E88CD3BBDB3D6004_terseLabel_en-US" xlink:label="lab_ara_PercentageOfAccountsReceivableOfTotalPatient_261BAB87250B1500E88CD3BBDB3D6004" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Maximum percent any other payor of total patient accounts receivable </link:label>
<link:label id="lab_ara_PercentageOfAccountsReceivableOfTotalPatient_261BAB87250B1500E88CD3BBDB3D6004_label_en-US" xlink:label="lab_ara_PercentageOfAccountsReceivableOfTotalPatient_261BAB87250B1500E88CD3BBDB3D6004" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Percentage of Accounts Receivable of Total Patient </link:label>
<link:label id="lab_ara_PercentageOfAccountsReceivableOfTotalPatient_261BAB87250B1500E88CD3BBDB3D6004_documentation_en-US" xlink:label="lab_ara_PercentageOfAccountsReceivableOfTotalPatient_261BAB87250B1500E88CD3BBDB3D6004" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Percentage of accounts receivable of total patient. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_PercentageOfAccountsReceivableOfTotalPatient" xlink:label="loc_ara_PercentageOfAccountsReceivableOfTotalPatient_261BAB87250B1500E88CD3BBDB3D6004" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentAbstract_7A82C085BA8C6AAAC681D3BBDB3DC962_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAbstract_7A82C085BA8C6AAAC681D3BBDB3DC962" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Property and Equipment </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_7A82C085BA8C6AAAC681D3BBDB3DC962" xlink:type="locator"/>
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<link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_52326994D88A1B281D26D3BBDB3DED6B_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_52326994D88A1B281D26D3BBDB3DED6B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Useful life </link:label>
<link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_52326994D88A1B281D26D3BBDB3DED6B_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_52326994D88A1B281D26D3BBDB3DED6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Property, Plant and Equipment, Useful Life </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_52326994D88A1B281D26D3BBDB3DED6B" xlink:type="locator"/>
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<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_1A15BB87D53E1328AC29D3BBDB3DB322_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_1A15BB87D53E1328AC29D3BBDB3DB322" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amortizable Intangible Assets </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_1A15BB87D53E1328AC29D3BBDB3DB322_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_1A15BB87D53E1328AC29D3BBDB3DB322" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Net [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_1A15BB87D53E1328AC29D3BBDB3DB322" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_1A15BB87D53E1328AC29D3BBDB3DB322" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_1A15BB87D53E1328AC29D3BBDB3DB322" xlink:type="arc"/>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_F68FE28BDA1BCACB5812D3BBDB3EA8BF_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_F68FE28BDA1BCACB5812D3BBDB3EA8BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Amortizable period </link:label>
<link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_F68FE28BDA1BCACB5812D3BBDB3EA8BF_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_F68FE28BDA1BCACB5812D3BBDB3EA8BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Finite-Lived Intangible Assets, Remaining Amortization Period </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_F68FE28BDA1BCACB5812D3BBDB3EA8BF" xlink:type="locator"/>
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<link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_01206E28E24850B1CF8AD3BBDB3ED9F3_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_01206E28E24850B1CF8AD3BBDB3ED9F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Identified Non‑Amortizable Intangible Assets and Goodwill </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_01206E28E24850B1CF8AD3BBDB3ED9F3" xlink:type="locator"/>
<link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_01206E28E24850B1CF8AD3BBDB3ED9F3" xlink:to="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_01206E28E24850B1CF8AD3BBDB3ED9F3" xlink:type="arc"/>
<link:label id="lab_us-gaap_NumberOfReportingUnits_6D84FE200A90ABF8175BD3BBDB3EBB25_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfReportingUnits_6D84FE200A90ABF8175BD3BBDB3EBB25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of reporting units </link:label>
<link:label id="lab_us-gaap_NumberOfReportingUnits_6D84FE200A90ABF8175BD3BBDB3EBB25_label_en-US" xlink:label="lab_us-gaap_NumberOfReportingUnits_6D84FE200A90ABF8175BD3BBDB3EBB25" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Number of Reporting Units </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfReportingUnits" xlink:label="loc_us-gaap_NumberOfReportingUnits_6D84FE200A90ABF8175BD3BBDB3EBB25" xlink:type="locator"/>
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<link:label id="lab_ara_ImpairmentOfIntangibleAssetsIndefiniteLivedIncludingGoodwill_144928311F3D7A2A82C7D3BBDB3FDCA6_terseLabel_en-US" xlink:label="lab_ara_ImpairmentOfIntangibleAssetsIndefiniteLivedIncludingGoodwill_144928311F3D7A2A82C7D3BBDB3FDCA6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Impairment charge </link:label>
<link:label id="lab_ara_ImpairmentOfIntangibleAssetsIndefiniteLivedIncludingGoodwill_144928311F3D7A2A82C7D3BBDB3FDCA6_label_en-US" xlink:label="lab_ara_ImpairmentOfIntangibleAssetsIndefiniteLivedIncludingGoodwill_144928311F3D7A2A82C7D3BBDB3FDCA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Impairment of Intangible Assets, Indefinite-lived (Including Goodwill) </link:label>
<link:label id="lab_ara_ImpairmentOfIntangibleAssetsIndefiniteLivedIncludingGoodwill_144928311F3D7A2A82C7D3BBDB3FDCA6_documentation_en-US" xlink:label="lab_ara_ImpairmentOfIntangibleAssetsIndefiniteLivedIncludingGoodwill_144928311F3D7A2A82C7D3BBDB3FDCA6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Amount of impairment loss resulting from write-down of assets, including goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. </link:label>
<link:loc xlink:href="ara-20181231.xsd#ara_ImpairmentOfIntangibleAssetsIndefiniteLivedIncludingGoodwill" xlink:label="loc_ara_ImpairmentOfIntangibleAssetsIndefiniteLivedIncludingGoodwill_144928311F3D7A2A82C7D3BBDB3FDCA6" xlink:type="locator"/>
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<link:label id="lab_us-gaap_AssetImpairmentChargesAbstract_CE7DD6E6EF054C858BD0D3BBDB3F61F5_terseLabel_en-US" xlink:label="lab_us-gaap_AssetImpairmentChargesAbstract_CE7DD6E6EF054C858BD0D3BBDB3F61F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Impairment of Long Lived Assets </link:label>
<link:label id="lab_us-gaap_AssetImpairmentChargesAbstract_CE7DD6E6EF054C858BD0D3BBDB3F61F5_label_en-US" xlink:label="lab_us-gaap_AssetImpairmentChargesAbstract_CE7DD6E6EF054C858BD0D3BBDB3F61F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Asset Impairment Charges [Abstract] </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetImpairmentChargesAbstract" xlink:label="loc_us-gaap_AssetImpairmentChargesAbstract_CE7DD6E6EF054C858BD0D3BBDB3F61F5" xlink:type="locator"/>
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<link:label id="lab_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_AD4507B0FD227B037014D3BBDB3FB1E8_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_AD4507B0FD227B037014D3BBDB3FB1E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Impairment charge </link:label>
<link:label id="lab_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_AD4507B0FD227B037014D3BBDB3FB1E8_label_en-US" xlink:label="lab_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_AD4507B0FD227B037014D3BBDB3FB1E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Impairment of Long-Lived Assets to be Disposed of </link:label>
<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_AD4507B0FD227B037014D3BBDB3FB1E8" xlink:type="locator"/>
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<link:label id="lab_ara_NumberOfClinics_4E6AECFB5005AB7A0E4CD3BBDB3F86BE_terseLabel_en-US" xlink:label="lab_ara_NumberOfClinics_4E6AECFB5005AB7A0E4CD3BBDB3F86BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Number of clinics </link:label>
<link:label id="lab_ara_NumberOfClinics_4E6AECFB5005AB7A0E4CD3BBDB3F86BE_label_en-US" xlink:label="lab_ara_NumberOfClinics_4E6AECFB5005AB7A0E4CD3BBDB3F86BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US"> Number Of Clinics </link:label>
<link:label id="lab_ara_NumberOfClinics_4E6AECFB5005AB7A0E4CD3BBDB3F86BE_documentation_en-US" xlink:label="lab_ara_NumberOfClinics_4E6AECFB5005AB7A0E4CD3BBDB3F86BE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US"> Represents the number of clinics mentioned in the complaint. </link:label>
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<link:label id="lab_us-gaap_GainOnBusinessInterruptionInsuranceRecovery_BF47EAF9C3C08A4849F0D3BBDB40AAC1_terseLabel_en-US" xlink:label="lab_us-gaap_GainOnBusinessInterruptionInsuranceRecovery_BF47EAF9C3C08A4849F0D3BBDB40AAC1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Gain on business interruption insurance </link:label>
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<link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_7D51E1207A3DC941C1F3D3BBDB400F65_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_7D51E1207A3DC941C1F3D3BBDB400F65" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US"> Right-of-use asset </link:label>
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