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        <PersonNm>JAMES JANKOVEC</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ANDREA MITCHELL</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JENNIFER RAMION</PersonNm>
        <TitleTxt>DIRECTOR, RESIDENT &amp; FELLOWS EDU.</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MELANIE STANTON</PersonNm>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
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      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
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      <ContractorCompensationGrp>
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          <BusinessName>
            <BusinessNameLine1Txt>FREEMAN AUDIO VISUAL</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 734596</AddressLine1Txt>
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            <StateAbbreviationCd>TX</StateAbbreviationCd>
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        <ServicesDesc>AV SERVICES</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>OLC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>9400 W HIGGINS RD STE 100</AddressLine1Txt>
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            <StateAbbreviationCd>IL</StateAbbreviationCd>
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        <ServicesDesc>COURSE HOSTING AND LAB FEES</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>HYATT REGENCY DENVER</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
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            <StateAbbreviationCd>CO</StateAbbreviationCd>
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          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CONFERENCE SERVICES</ServicesDesc>
        <CompensationAmt>220713</CompensationAmt>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>EDWARD WOJTYS</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>6235 HELLNER ROAD</AddressLine1Txt>
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          </USAddress>
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        <ServicesDesc>EDITORIAL SERVICES</ServicesDesc>
        <CompensationAmt>218556</CompensationAmt>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>SERVICE AMERICA CORPORATION</BusinessNameLine1Txt>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>700 14TH STREET</AddressLine1Txt>
            <CityNm>DENVER</CityNm>
            <StateAbbreviationCd>CO</StateAbbreviationCd>
            <ZIPCd>80202</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CONFERENCE VENDING SERVICES</ServicesDesc>
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      <TotalContributionsAmt>84886</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
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        <RelatedOrExemptFuncIncomeAmt>2149785</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>561929</UnrelatedBusinessRevenueAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP DUES</Desc>
        <BusinessCd>611430</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>2526203</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>EDUCATIONAL EVENTS</Desc>
        <BusinessCd>611430</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>1813833</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>INDUSTRY SPONSORSHIP</Desc>
        <BusinessCd>611430</BusinessCd>
        <TotalRevenueColumnAmt>1436408</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1436408</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
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      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>486049</TotalRevenueColumnAmt>
        <ExclusionAmt>486049</ExclusionAmt>
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      <GrossRentsGrp>
        <RealAmt>88254</RealAmt>
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      <LessRentalExpensesGrp>
        <RealAmt>0</RealAmt>
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      <RentalIncomeOrLossGrp>
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      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>88254</TotalRevenueColumnAmt>
        <ExclusionAmt>88254</ExclusionAmt>
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      <LessCostOthBasisSalesExpnssGrp>
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      <GainOrLossGrp>
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      <NetGainOrLossInvestmentsGrp>
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        <ExclusionAmt>104081</ExclusionAmt>
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        <ExclusionAmt>11823</ExclusionAmt>
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      <GrantsToDomesticOrgsGrp>
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        <ProgramServicesAmt>889508</ProgramServicesAmt>
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      <GrantsToDomesticIndividualsGrp>
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        <ProgramServicesAmt>33496</ProgramServicesAmt>
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      <FeesForServicesAccountingGrp>
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        <ManagementAndGeneralAmt>72147</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>79833</ProgramServicesAmt>
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        <ProgramServicesAmt>389887</ProgramServicesAmt>
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        <ProgramServicesAmt>2356486</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>234696</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>141805</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>32000</ManagementAndGeneralAmt>
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        <EOYAmt>5124570</EOYAmt>
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        <CurrentTaxYearMinus1YearAmt>474326</CurrentTaxYearMinus1YearAmt>
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        <CurrentTaxYearAmt>11823</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus1YearAmt>8868948</CurrentTaxYearMinus1YearAmt>
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        <FormAndLineReferenceDesc>SCHEDULE A, PART III, LINE 12, EXPLANATION OF OTHER INCOME:</FormAndLineReferenceDesc>
        <ExplanationTxt>MISCELLANEOUS - 2021 AMOUNT: $ 18,563. 2022 AMOUNT: $ 5,750. 2023 AMOUNT: $ 5,897. 2024 AMOUNT: $ 11,823.</ExplanationTxt>
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          <City>RESTRICTED</City>
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        <FilingOrganizationsTotalAmt>22000</FilingOrganizationsTotalAmt>
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        <FilingOrganizationsTotalAmt>677091</FilingOrganizationsTotalAmt>
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        <FilingOrganizationsTotalAmt>169273</FilingOrganizationsTotalAmt>
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        <CurrentYearMinus1Amt>688068</CurrentYearMinus1Amt>
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        <CurrentYearMinus1Amt>22000</CurrentYearMinus1Amt>
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        <EndYearBalanceAmt>894813</EndYearBalanceAmt>
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        <BeginningYearBalanceAmt>900548</BeginningYearBalanceAmt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ENDOWMENT CONSISTS OF FOUR INDIVIDUAL FUNDS HELD BY THE ORTHOPAEDIC RESEARCH AND EDUCATION FOUNDATON AND ESTABLISHED FOR EDUCATIONAL PURPOSES, ALL OF WHICH ARE DONOR-RESTRICTED ENDOWMENT FUNDS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY IS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE. UNDER THIS SECTION, UNRELATED BUSINESS INCOME, AS DEFINED, IS SUBJECT TO FEDERAL AND STATE TAXES AT CORPORATE RATES. THE SOCIETY RECOGNIZES THE FINANCIAL STATEMENT IMPACT OF A TAX POSITION WHEN IT IS MORE LIKELY THAN NOT THAT THE POSITION WILL BE SUSTAINED UPON EXAMINATION. THE SOCIETY FILES TAX RETURNS IN THE U.S. FEDERAL JURISDICTION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>AT SIX MONTH INTERVALS, THE GRANT WINNERS SUBMIT A WRITTEN NARRATIVE PROGRESS REPORT AND A BUDGET REPORT. THESE REPORTS ARE REVIEWED BY THE CHAIR OF THE RESEARCH COMMITTEE TO VERIFY COMPLIANCE. IF THE CHAIR DETERMINES THAT THE GRANT IS IN COMPLIANCE, THE NEXT GRANT INSTALLMENT IS APPROVED BY PAYMENT. AWARDS: THE PRINCIPAL INVESTIGATOR OF ANY AWARD WILL BE EXPECTED TO DELIVER A PRESENTATION AT THE NEXT AOSSM ANNUAL MEETING. PAPERS CANNOT HAVE BEEN PUBLISHED, PRESENTED OR ACCEPTED FOR PRESENTATION ELSEWHERE PRIOR TO THIS SUBMISSION. IF ANY PORTION OF THE DATA FOR THIS SUBMISSION HAS BEEN PRESENTED OR ACCEPTED FOR PRESENTATION ELSEWHERE, THIS APPLICATION MUST INCLUDE AN ABSTRACT OF PREVIOUSLY SHARED DATE WITH MEETING DATE, LOCATION AND ORGANIZATION DISCLOSED. NO PORTION OF THE DATA PRESENTED IN THE PAPER CAN HAVE BEEN PUBLISHED OR ACCEPTED FOR PUBLICATION. ALL WORK MUST BE ORIGINAL IN ORDER TO BE CONSIDERED FOR THE AWARD.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>EXPENSES ARE RECOGNIZED ON THE ACCRUAL BASIS.</ExplanationTxt>
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          <AddressLine1Txt>601 WALNUT STREET SUITE L50</AddressLine1Txt>
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          <CityNm>ROANOKE</CityNm>
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        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
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      <RecipientTable>
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          <StateAbbreviationCd>MI</StateAbbreviationCd>
          <ZIPCd>48201</ZIPCd>
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      <RecipientTable>
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      <RecipientTable>
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          <BusinessNameLine1Txt>MAYO CLINIC</BusinessNameLine1Txt>
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        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
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          <BusinessNameLine1Txt>MISSISSIPPI SPORTS MEDICINE FOUNDATION</BusinessNameLine1Txt>
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          <AddressLine1Txt>PO DRAWER 16870</AddressLine1Txt>
          <CityNm>JACKSON</CityNm>
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        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
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      <RecipientTable>
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          <AddressLine1Txt>550 1ST AVENUE</AddressLine1Txt>
          <CityNm>NEW YORK</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
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          <AddressLine2Txt>SUITE 1402</AddressLine2Txt>
          <CityNm>NEW YORK</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
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        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANTRESEARCH PROJECT GRANT</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>OHIO STATE UNIVERSITY</BusinessNameLine1Txt>
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          <AddressLine2Txt>BLANKENSHIP HALL</AddressLine2Txt>
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          <StateAbbreviationCd>OH</StateAbbreviationCd>
          <ZIPCd>43210</ZIPCd>
        </USAddress>
        <RecipientEIN>316025986</RecipientEIN>
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        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
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          <BusinessNameLine1Txt>OREF</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>9400 W HIGGINS RD STE 215</AddressLine1Txt>
          <CityNm>ROSEMONT</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60018</ZIPCd>
        </USAddress>
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        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>REGENTS OF THE UNIVERSITY OF CALIFORNIA LOS ANGELES</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>405 HILGARD AVENUE BOX 957089 1125</AddressLine1Txt>
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          <CityNm>LOS ANGELES</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>90095</ZIPCd>
        </USAddress>
        <RecipientEIN>956006143</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>13200</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>THE BOARD OF REGENTS OF THE UNIVERSITY OF WISCONSIN SYSTEM</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>DRAWER 538</AddressLine1Txt>
          <CityNm>MILWAUKEE</CityNm>
          <StateAbbreviationCd>WI</StateAbbreviationCd>
          <ZIPCd>53278</ZIPCd>
        </USAddress>
        <RecipientEIN>396006492</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>25000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>THE NEMOURS FOUNDATION</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>10140 CENTURION PARKWAY NORTH</AddressLine1Txt>
          <CityNm>JACKSONVILLE</CityNm>
          <StateAbbreviationCd>FL</StateAbbreviationCd>
          <ZIPCd>32256</ZIPCd>
        </USAddress>
        <RecipientEIN>590634433</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>41000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>TRIA ORTHOPEDIC CENTER PROGRAM</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>8170 33RD AVENUE SOUTH PO BOX 1309</AddressLine1Txt>
          <CityNm>MINNEAPOLIS</CityNm>
          <StateAbbreviationCd>MN</StateAbbreviationCd>
          <ZIPCd>55440</ZIPCd>
        </USAddress>
        <RecipientEIN>411670163</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>13200</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF CALIFORNIA SAN FRANCISCO</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 748872</AddressLine1Txt>
          <CityNm>LOS ANGELES</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>90074</ZIPCd>
        </USAddress>
        <RecipientEIN>946036493</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>24000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF PITTSBURGH</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 640458</AddressLine1Txt>
          <CityNm>PITTSBURGH</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>15264</ZIPCd>
        </USAddress>
        <RecipientEIN>250965591</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>24000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF ROCHESTER</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>910 GENESEE STREET SUITE 200</AddressLine1Txt>
          <CityNm>ROCHESTER</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>14611</ZIPCd>
        </USAddress>
        <RecipientEIN>160743209</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>15960</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF SOUTHERN CALIFORNIA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>UNIVERSITY GARDENS BUILDING SUITE</AddressLine1Txt>
          <AddressLine2Txt>205</AddressLine2Txt>
          <CityNm>LOS ANGELES</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>90089</ZIPCd>
        </USAddress>
        <RecipientEIN>951642394</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>13200</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF UTAH</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>201 S PRESIDENTS CIRCLE</AddressLine1Txt>
          <CityNm>SALT LAKE CITY</CityNm>
          <StateAbbreviationCd>UT</StateAbbreviationCd>
          <ZIPCd>84112</ZIPCd>
        </USAddress>
        <RecipientEIN>876000525</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>12500</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UT SOUTHWESTERN MEDICAL CENTER</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 841765 1950 N STEMMONS</AddressLine1Txt>
          <AddressLine2Txt>FREEWAY STE 5010</AddressLine2Txt>
          <CityNm>DALLAS</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>75207</ZIPCd>
        </USAddress>
        <RecipientEIN>756002868</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>25000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH PROJECT GRANT</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>22</Total501c3OrgCnt>
      <TotalOtherOrgCnt>1</TotalOtherOrgCnt>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>HONORARIUM</GrantTypeTxt>
        <RecipientCnt>13</RecipientCnt>
        <CashGrantAmt>33496</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>AT SIX MONTH INTERVALS, THE GRANT WINNERS SUBMIT A WRITTEN NARRATIVE PROGRESS REPORT AND A BUDGET REPORT. THESE REPORTS ARE REVIEWED BY THE CHAIR OF THE RESEARCH COMMITTEE TO VERIFY COMPLIANCE. IF THE CHAIR DETERMINES THAT THE GRANT IS IN COMPLIANCE, THE NEXT GRANT INSTALLMENT IS APPROVED BY PAYMENT. AWARDS: THE PRINCIPAL INVESTIGATOR OF ANY AWARD WILL BE EXPECTED TO DELIVER A PRESENTATION AT THE NEXT AOSSM ANNUAL MEETING. PAPERS CANNOT HAVE BEEN PUBLISHED, PRESENTED OR ACCEPTED FOR PRESENTATION ELSEWHERE PRIOR TO THIS SUBMISSION. IF ANY PORTION OF THE DATA FOR THIS SUBMISSION HAS BEEN PRESENTED OR ACCEPTED FOR PRESENTATION ELSEWHERE, THIS APPLICATION MUST INCLUDE AN ABSTRACT OF PREVIOUSLY SHARED DATE WITH MEETING DATE, LOCATION AND ORGANIZATION DISCLOSED. NO PORTION OF THE DATA PRESENTED IN THE PAPER CAN HAVE BEEN PUBLISHED OR ACCEPTED FOR PUBLICATION. ALL WORK MUST BE ORIGINAL IN ORDER TO BE CONSIDERED FOR THE AWARD.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <FirstClassOrCharterTravelInd>X</FirstClassOrCharterTravelInd>
      <TravelForCompanionsInd>X</TravelForCompanionsInd>
      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>1</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>BRUCE REIDER MD</PersonNm>
        <TitleTxt>EXEC. EDITOR MED. PUB.</TitleTxt>
        <BaseCompensationFilingOrgAmt>548929</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>20625</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>22608</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>592162</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>GREG DUMMER CAE</PersonNm>
        <TitleTxt>CEO</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>27500</DeferredCompensationFlngOrgAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>CHRISTINA TOMASO CAE</PersonNm>
        <TitleTxt>COO</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>16564</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>197620</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LYNETTE CRAFT PHD</PersonNm>
        <TitleTxt>SENIOR DIRECTOR, RESEARCH</TitleTxt>
        <BaseCompensationFilingOrgAmt>145600</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>159926</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JENNIFER RAMION</PersonNm>
        <TitleTxt>DIRECTOR, RESIDENT &amp; FELLOWS EDU.</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
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        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MELANIE STANTON</PersonNm>
        <TitleTxt>SENIOR DIRECTOR, CORP. DEV.</TitleTxt>
        <BaseCompensationFilingOrgAmt>150000</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
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        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>14905</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>164905</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>FIRST CLASS TRAVEL IS PROVIDED TO THE BOARD PRESIDENT AND SPOUSE FOR TRAVEL TO THE ANNUAL CONFERENCE. THE BENEFIT IS NOT TREATED AS TAXABLE COMPENSATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOLLOWING INDIVIDUALS RECEIVED AN ALLOCATION FROM A SUPPLEMENTAL NON-QUALIFIED RETIREMENT PLAN: BRUCE REIDER: $50,000 AND GREG DUMMER: $30,000</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>ACTIVE MEMBERS ARE U.S. OR CANADIAN CITIZENS WHO ARE ORTHOPAEDIC SURGEONS SPECIALIZING IN SPORTS MEDICINE. ACTIVE MEMBERS ARE ELIGIBLE TO VOTE, AND UNLESS SPECIFIED OTHERWISE, TO HOLD OFFICE IN THE SOCIETY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>NOMINATIONS FOR OFFICERS AND OTHER BOARD MEMBERS SHALL BE MADE AT THE ANNUAL MEETING BY THE NOMINATING COMMITTEE. ONLY ACTIVE MEMBERS OF THE SOCIETY IN GOOD STANDING WITH DUES PAID ARE ELIGIBLE TO BE NOMINATED. ELECTION OF OFFICERS AND OTHER BOARD MEMBERS SHALL BE MADE BY THOSE ACTIVE MEMBERS PRESENT AT THE ANNUAL MEETING, WITH A MAJORITY OF THOSE PRESENT AND CAPABLE OF VOTING REQUIRED TO ELECT. IF ONLY ONE CANDIDATE IS NOMINATED FOR EACH OPEN POSITION, ELECTION MAY BE BY GENERAL CONSENT. EACH ACTIVE MEMBER WHO IS PRESENT AT THE ANNUAL MEETING SHALL BE ENTITLED TO ONE VOTE FOR EACH BOARD MEMBER TO BE ELECTED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS PREPARED BY THE ORGANIZATION'S EXTERNAL ACCOUNTANTS AND IS REVIEWED BY MANAGEMENT. THE FORM 990 IS MADE AVAILABLE TO THE BOARD OF DIRECTORS BY POSTING THE RETURN TO A WEB PORTAL. THE BOARD OF DIRECTORS DOES NOT FORMALLY APPROVE THE 990, BUT DOES HAVE THE OPPORTUNITY TO REVIEW THE RETURN BEFORE FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>BOARD MEMBERS ARE REQUIRED TO DISCLOSE POSSIBLE CONFLICTS OF INTEREST UPON ELECTION TO THE BOARD AND ON A RECURRING BASIS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>REVIEW OF EXECUTIVE DIRECTOR'S COMPENSATION INCLUDES REVIEW AND APPROVAL BY INDEPENDENT PERSONS AND COMPARABILITY DATA. WRITTEN EMPLOYMENT CONTRACT IS REVIEWED BY THE BOARD. THE DELIBERATION AND THE DECISION ARE CONTEMPORANEOUSLY DOCUMENTED. SAME PROCEDURES APPLY TO KEY EMPLOYEES AS TO EXECUTIVE DIRECTOR. OFFICERS ARE VOLUNTEERS AND ARE NOT COMPENSATED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 18</FormAndLineReferenceDesc>
        <ExplanationTxt>AVAILABLE UPON REQUEST</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>AVAILABLE UPON REQUEST</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S BOARD OF DIRECTORS ASSUMES RESPONSIBILITY FOR OVERSIGHT OF THE AUDIT OF ITS FINANCIAL STATEMENTS AND THE SELECTION OF AN INDEPENDENT ACCOUNTANT. THIS PROCESS HAS NOT CHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>