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    <link:label id="lab_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_96174F4455ADD2606B132474FB3A3CE4_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_96174F4455ADD2606B132474FB3A3CE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss on impairment/disposal of long-term assets</link:label>
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    <link:label id="lab_us-gaap_OtherNoncashIncomeExpense_884B946287426B7A03822474FB3AF421_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense_884B946287426B7A03822474FB3AF421" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_23C5F9D6E6EE9ACDCAF32474FB3A4367_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_23C5F9D6E6EE9ACDCAF32474FB3A4367" 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/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_23C5F9D6E6EE9ACDCAF32474FB3A4367" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_23C5F9D6E6EE9ACDCAF32474FB3A4367" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_23C5F9D6E6EE9ACDCAF32474FB3A4367" xlink:type="arc" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_10E87183346FEB33E4062474FB3AE36D" xlink:type="locator" />
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    <link:label id="lab_ango_PaymentsToAcquireIntangibleAssetsNetOfCashAcquired_7D8977323F226817024D2474FB3B565E_negatedLabel_en-US" xlink:label="lab_ango_PaymentsToAcquireIntangibleAssetsNetOfCashAcquired_7D8977323F226817024D2474FB3B565E" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Acquisition of intangible assets</link:label>
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_F7E7E9632A81192081462474FB3B954C_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_F7E7E9632A81192081462474FB3B954C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Acquisition of warrants</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_8BF7EBDC20B3532E4C7F2474FB3BA4E3_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_8BF7EBDC20B3532E4C7F2474FB3BA4E3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_8BF7EBDC20B3532E4C7F2474FB3BA4E3_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_8BF7EBDC20B3532E4C7F2474FB3BA4E3" 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/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_8BF7EBDC20B3532E4C7F2474FB3BA4E3" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_F55153D4830011008BD42474FB3BD9C4_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_F55153D4830011008BD42474FB3BD9C4" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Repayment of long-term debt</link:label>
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    <link:label id="lab_us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1_239AD522B63512E8390D2474FB3CE6C9_verboseLabel_en-US" xlink:label="lab_us-gaap_NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1_239AD522B63512E8390D2474FB3CE6C9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Contractual obligations for acquisition of fixed assets</link:label>
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    <link:label id="lab_ango_CashPaidDuringPeriodAbstract_FF0A4E16BA268F3169132474FB3C3D81_verboseLabel_en-US" xlink:label="lab_ango_CashPaidDuringPeriodAbstract_FF0A4E16BA268F3169132474FB3C3D81" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash paid during the period for:</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_9C2EE838469DB3F93AC138519610A80C_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_9C2EE838469DB3F93AC138519610A80C" 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, Award Vesting Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_9C2EE838469DB3F93AC138519610A80C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_637B1E30F95C425E5053385196105C26_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_637B1E30F95C425E5053385196105C26" 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, Award Vesting Rights, Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_637B1E30F95C425E5053385196105C26" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_637B1E30F95C425E5053385196105C26" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_637B1E30F95C425E5053385196105C26" xlink:type="arc" />
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    <link:label id="lab_ango_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingInstallments_BEB16B810EAE83F4AC7E38519611901B_documentation_en-US" xlink:label="lab_ango_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingInstallments_BEB16B810EAE83F4AC7E38519611901B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Installments</link:label>
    <link:loc xlink:href="ango-20160531.xsd#ango_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingInstallments" xlink:label="loc_ango_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingInstallments_BEB16B810EAE83F4AC7E38519611901B" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_FC502D30089B1A2ECD78227655E1D0BD" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_6007ED092DCAF15D5B64227655E1921F_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_6007ED092DCAF15D5B64227655E1921F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Amortized cost and fair value of marketable securities by contractual maturity</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_6007ED092DCAF15D5B64227655E1921F_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_6007ED092DCAF15D5B64227655E1921F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_6007ED092DCAF15D5B64227655E1921F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_6007ED092DCAF15D5B64227655E1921F" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_6007ED092DCAF15D5B64227655E1921F" xlink:type="arc" />
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    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_39C483A135A17C3B51EB227655E1A640_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_39C483A135A17C3B51EB227655E1A640" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_39C483A135A17C3B51EB227655E1A640" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_39C483A135A17C3B51EB227655E1A640" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_39C483A135A17C3B51EB227655E1A640" xlink:type="arc" />
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    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_1AECF7E0B8CA4B073001227655E1FA36_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_1AECF7E0B8CA4B073001227655E1FA36" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_1AECF7E0B8CA4B073001227655E1FA36" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_1AECF7E0B8CA4B073001227655E1FA36" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_1AECF7E0B8CA4B073001227655E1FA36" xlink:type="arc" />
    <link:label id="lab_ango_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTwentyYearsAmortizedCost_D58408DCCCE5712C1B35227655E19B01_verboseLabel_en-US" xlink:label="lab_ango_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTwentyYearsAmortizedCost_D58408DCCCE5712C1B35227655E19B01" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Amortized cost, Due after five through twenty years</link:label>
    <link:label id="lab_ango_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTwentyYearsAmortizedCost_D58408DCCCE5712C1B35227655E19B01_label_en-US" xlink:label="lab_ango_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTwentyYearsAmortizedCost_D58408DCCCE5712C1B35227655E19B01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available for Sale Securities Debt Maturities After Five Through Twenty Years Amortized Cost</link:label>
    <link:label id="lab_ango_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTwentyYearsAmortizedCost_D58408DCCCE5712C1B35227655E19B01_documentation_en-US" xlink:label="lab_ango_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTwentyYearsAmortizedCost_D58408DCCCE5712C1B35227655E19B01" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Available for sale securities debt maturities after five through twenty years amortized cost.</link:label>
    <link:loc xlink:href="ango-20160531.xsd#ango_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTwentyYearsAmortizedCost" xlink:label="loc_ango_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTwentyYearsAmortizedCost_D58408DCCCE5712C1B35227655E19B01" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_8CEC4FC5D116EA666216227655E17E59_totalLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_8CEC4FC5D116EA666216227655E17E59" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Amortized cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_8CEC4FC5D116EA666216227655E17E59_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_8CEC4FC5D116EA666216227655E17E59" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Debt Securities, Amortized Cost Basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_8CEC4FC5D116EA666216227655E17E59" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_8CEC4FC5D116EA666216227655E17E59" xlink:to="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_8CEC4FC5D116EA666216227655E17E59" xlink:type="arc" />
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    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_663E845537373CDB49FF227655E10A03_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_663E845537373CDB49FF227655E10A03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_663E845537373CDB49FF227655E10A03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_663E845537373CDB49FF227655E10A03" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_663E845537373CDB49FF227655E10A03" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_D2A162B50408929210C8227655E15F87_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_D2A162B50408929210C8227655E15F87" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Due after one through five years</link:label>
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    <link:label id="lab_us-gaap_LongtermDebtTypeAxis_61140F046C100DD770B8227A44E7EFE0_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis_61140F046C100DD770B8227A44E7EFE0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Axis]</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_EC88B674D567B1A13E7C227D8B777866_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_EC88B674D567B1A13E7C227D8B777866" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">State interest rate</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_1714EFF3F00BF77801DE227A44E85F73_verboseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_1714EFF3F00BF77801DE227A44E85F73" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Commitment fee percentage</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_0A8E9A6C225768AA30AA2276571D7B69" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_E9A5DD27EB9826F058782276571DD1B2_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_E9A5DD27EB9826F058782276571DD1B2" 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>
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    <link:label id="lab_us-gaap_PurchaseObligation_119BABACE0ED5AF1B67522D05EE8B66A_verboseLabel_en-US" xlink:label="lab_us-gaap_PurchaseObligation_119BABACE0ED5AF1B67522D05EE8B66A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total future purchase obligations due through 2021</link:label>
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_22F4C00870FFB0D354C2227655D7562A_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_22F4C00870FFB0D354C2227655D7562A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Expected amortization expense</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_22F4C00870FFB0D354C2227655D7562A_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_22F4C00870FFB0D354C2227655D7562A" 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/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_22F4C00870FFB0D354C2227655D7562A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9D32FE87BB87EE5F4908227655D7F044_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9D32FE87BB87EE5F4908227655D7F044" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2017</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_9D32FE87BB87EE5F4908227655D7F044" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DE9BD9623B77A6153D32227655D72D71_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DE9BD9623B77A6153D32227655D72D71" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2018</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DE9BD9623B77A6153D32227655D72D71" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DE9BD9623B77A6153D32227655D72D71" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DE9BD9623B77A6153D32227655D72D71" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_AF0B70E41A6C58E51520227655D7333A_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_AF0B70E41A6C58E51520227655D7333A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2019</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_AF0B70E41A6C58E51520227655D7333A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_A60859DD3D64D853B57A227655D79B5C_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_A60859DD3D64D853B57A227655D79B5C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_A60859DD3D64D853B57A227655D79B5C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_85CD3203D564A37EC6F6227655D7597A_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_85CD3203D564A37EC6F6227655D7597A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_85CD3203D564A37EC6F6227655D7597A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_5AAB6CD9CF6F4BD4B3F52276570B66B1_verboseLabel_en-US" xlink:label="lab_us-gaap_ComponentsOfIncomeTaxExpenseBenefitContinuingOperationsAbstract_5AAB6CD9CF6F4BD4B3F52276570B66B1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Summary of Income tax (benefit) provision analyzed by category</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_35E309A3DEA5D3A9F2642474FB27A01A_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_35E309A3DEA5D3A9F2642474FB27A01A" 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_35E309A3DEA5D3A9F2642474FB27A01A_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentUsefulLife_35E309A3DEA5D3A9F2642474FB27A01A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Useful Life</link:label>
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    <link:label id="lab_ango_MedicalDeviceExciseTax_7EE2FC1EA2CD87A009A52474FB27DA9D_verboseLabel_en-US" xlink:label="lab_ango_MedicalDeviceExciseTax_7EE2FC1EA2CD87A009A52474FB27DA9D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Medical device excise tax</link:label>
    <link:label id="lab_ango_MedicalDeviceExciseTax_7EE2FC1EA2CD87A009A52474FB27DA9D_label_en-US" xlink:label="lab_ango_MedicalDeviceExciseTax_7EE2FC1EA2CD87A009A52474FB27DA9D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Medical Device Excise Tax</link:label>
    <link:label id="lab_ango_MedicalDeviceExciseTax_7EE2FC1EA2CD87A009A52474FB27DA9D_documentation_en-US" xlink:label="lab_ango_MedicalDeviceExciseTax_7EE2FC1EA2CD87A009A52474FB27DA9D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of excise tax imposed on the sale of certain medical devices.</link:label>
    <link:loc xlink:href="ango-20160531.xsd#ango_MedicalDeviceExciseTax" xlink:label="loc_ango_MedicalDeviceExciseTax_7EE2FC1EA2CD87A009A52474FB27DA9D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_8E273E45E80D5E55AE642474FB274127_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_8E273E45E80D5E55AE642474FB274127" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Write-off of hardware assets</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_8E273E45E80D5E55AE642474FB274127" xlink:type="locator" />
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    <link:label id="lab_ango_CostsForQualityCallToActionProgram_618EAAA68BBD2C2E69DA2474FB2729F2_verboseLabel_en-US" xlink:label="lab_ango_CostsForQualityCallToActionProgram_618EAAA68BBD2C2E69DA2474FB2729F2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Costs for quality call to action program</link:label>
    <link:label id="lab_ango_CostsForQualityCallToActionProgram_618EAAA68BBD2C2E69DA2474FB2729F2_label_en-US" xlink:label="lab_ango_CostsForQualityCallToActionProgram_618EAAA68BBD2C2E69DA2474FB2729F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Costs for Quality Call to Action Program</link:label>
    <link:label id="lab_ango_CostsForQualityCallToActionProgram_618EAAA68BBD2C2E69DA2474FB2729F2_documentation_en-US" xlink:label="lab_ango_CostsForQualityCallToActionProgram_618EAAA68BBD2C2E69DA2474FB2729F2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Costs for quality call to action program.</link:label>
    <link:loc xlink:href="ango-20160531.xsd#ango_CostsForQualityCallToActionProgram" xlink:label="loc_ango_CostsForQualityCallToActionProgram_618EAAA68BBD2C2E69DA2474FB2729F2" xlink:type="locator" />
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    <link:label id="lab_ango_NumberOfObservations_107DBC27421362A82CA92474FB27EE76_verboseLabel_en-US" xlink:label="lab_ango_NumberOfObservations_107DBC27421362A82CA92474FB27EE76" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of observations</link:label>
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    <link:label id="lab_ango_NumberOfObservations_107DBC27421362A82CA92474FB27EE76_documentation_en-US" xlink:label="lab_ango_NumberOfObservations_107DBC27421362A82CA92474FB27EE76" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of observations.</link:label>
    <link:loc xlink:href="ango-20160531.xsd#ango_NumberOfObservations" xlink:label="loc_ango_NumberOfObservations_107DBC27421362A82CA92474FB27EE76" xlink:type="locator" />
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    <link:label id="lab_ango_NumberOfBusinessDaysToProvideResponse_DB9F212916BEA53410262474FB279C37_verboseLabel_en-US" xlink:label="lab_ango_NumberOfBusinessDaysToProvideResponse_DB9F212916BEA53410262474FB279C37" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of business days to provide response to FDA</link:label>
    <link:label id="lab_ango_NumberOfBusinessDaysToProvideResponse_DB9F212916BEA53410262474FB279C37_label_en-US" xlink:label="lab_ango_NumberOfBusinessDaysToProvideResponse_DB9F212916BEA53410262474FB279C37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Business Days to Provide Response</link:label>
    <link:label id="lab_ango_NumberOfBusinessDaysToProvideResponse_DB9F212916BEA53410262474FB279C37_documentation_en-US" xlink:label="lab_ango_NumberOfBusinessDaysToProvideResponse_DB9F212916BEA53410262474FB279C37" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of business days to provide response.</link:label>
    <link:loc xlink:href="ango-20160531.xsd#ango_NumberOfBusinessDaysToProvideResponse" xlink:label="loc_ango_NumberOfBusinessDaysToProvideResponse_DB9F212916BEA53410262474FB279C37" xlink:type="locator" />
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    <link:label id="lab_ango_ShortTermInvestmentsMaturityPeriod_4374BC832B2E9103ED812474FB274683_documentation_en-US" xlink:label="lab_ango_ShortTermInvestmentsMaturityPeriod_4374BC832B2E9103ED812474FB274683" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Short term investments maturity period.</link:label>
    <link:loc xlink:href="ango-20160531.xsd#ango_ShortTermInvestmentsMaturityPeriod" xlink:label="loc_ango_ShortTermInvestmentsMaturityPeriod_4374BC832B2E9103ED812474FB274683" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AvailableforsaleSecuritiesFailedAuctionValue_9EB87C91B905671C83FF2474FB27F423_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableforsaleSecuritiesFailedAuctionValue_9EB87C91B905671C83FF2474FB27F423" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investments in auction rate securities that failed auctions</link:label>
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    <link:label id="lab_ango_NumberOfInvestmentsFailedAtAuction_511818257AD729E6E3812474FB271B60_verboseLabel_en-US" xlink:label="lab_ango_NumberOfInvestmentsFailedAtAuction_511818257AD729E6E3812474FB271B60" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of investments</link:label>
    <link:label id="lab_ango_NumberOfInvestmentsFailedAtAuction_511818257AD729E6E3812474FB271B60_label_en-US" xlink:label="lab_ango_NumberOfInvestmentsFailedAtAuction_511818257AD729E6E3812474FB271B60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Investments Failed at Auction</link:label>
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    <link:loc xlink:href="ango-20160531.xsd#ango_NumberOfInvestmentsFailedAtAuction" xlink:label="loc_ango_NumberOfInvestmentsFailedAtAuction_511818257AD729E6E3812474FB271B60" xlink:type="locator" />
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    <link:label id="lab_ango_AccountsReceivableDuePeriod_B3C0A394D9F9BF83C4982474FB27D0CE_verboseLabel_en-US" xlink:label="lab_ango_AccountsReceivableDuePeriod_B3C0A394D9F9BF83C4982474FB27D0CE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accounts receivables period due</link:label>
    <link:label id="lab_ango_AccountsReceivableDuePeriod_B3C0A394D9F9BF83C4982474FB27D0CE_label_en-US" xlink:label="lab_ango_AccountsReceivableDuePeriod_B3C0A394D9F9BF83C4982474FB27D0CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Receivable Due Period</link:label>
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    <link:loc xlink:href="ango-20160531.xsd#ango_AccountsReceivableDuePeriod" xlink:label="loc_ango_AccountsReceivableDuePeriod_B3C0A394D9F9BF83C4982474FB27D0CE" xlink:type="locator" />
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    <link:label id="lab_ango_PercentageOfRestockingCharge_645FF937E1897185A1A12474FB289422_verboseLabel_en-US" xlink:label="lab_ango_PercentageOfRestockingCharge_645FF937E1897185A1A12474FB289422" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Restocking charge percentage</link:label>
    <link:label id="lab_ango_PercentageOfRestockingCharge_645FF937E1897185A1A12474FB289422_label_en-US" xlink:label="lab_ango_PercentageOfRestockingCharge_645FF937E1897185A1A12474FB289422" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of Restocking Charge</link:label>
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    <link:loc xlink:href="ango-20160531.xsd#ango_PercentageOfRestockingCharge" xlink:label="loc_ango_PercentageOfRestockingCharge_645FF937E1897185A1A12474FB289422" xlink:type="locator" />
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    <link:label id="lab_ango_NumberOfMonthsRemainingForProductToBeAcceptedPriorToExpirationDateOfProduct_C4A387C5414FF95CE67C2474FB28E4F7_verboseLabel_en-US" xlink:label="lab_ango_NumberOfMonthsRemainingForProductToBeAcceptedPriorToExpirationDateOfProduct_C4A387C5414FF95CE67C2474FB28E4F7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Undamaged product expiration date</link:label>
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    <link:label id="lab_ango_NumberOfMonthsRemainingForProductToBeAcceptedPriorToExpirationDateOfProduct_C4A387C5414FF95CE67C2474FB28E4F7_documentation_en-US" xlink:label="lab_ango_NumberOfMonthsRemainingForProductToBeAcceptedPriorToExpirationDateOfProduct_C4A387C5414FF95CE67C2474FB28E4F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of months remaining for product to be accepted prior to expiration date of product</link:label>
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    <link:label id="lab_ango_PrepaidLicenseeFees_CCF28DBF4DDFF231F1A92276565F8E44_verboseLabel_en-US" xlink:label="lab_ango_PrepaidLicenseeFees_CCF28DBF4DDFF231F1A92276565F8E44" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">License fees</link:label>
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    <link:label id="lab_us-gaap_LeaseAndRentalExpense_E74476B6137D43D35931232C910DD6A0_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseAndRentalExpense_E74476B6137D43D35931232C910DD6A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lease expense</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_191E02BF8DA3CE752B692276563BD745_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_191E02BF8DA3CE752B692276563BD745" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Property, Plant and Equipment [Table]</link:label>
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