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        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
        <CashGrantAmt>3325</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFE</MannerOfCashDisbursementTxt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>2</Total501c3OrgCnt>
      <TotalOtherOrgCnt>2</TotalOtherOrgCnt>
      <TransferToForeignCorpInd>false</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>false</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>false</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>false</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>false</ForeignPartnershipInd>
      <BoycottCountriesInd>false</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 2 - Grantmakers Explanation For Monitoring Use of Funds Outside US</FormAndLineReferenceDesc>
        <ExplanationTxt>WHEN A GRANT IS AWARDED THERE ARE SUBSTANTIAL AND REGULAR INTERACTIONS BETWEEN GRANTEES AND THE MDF APPOINTED PROJECT ADVISORY COMMITTEE. THE ADVISORY COMMITTEE PROVIDES OVERSIGHT AND GUIDANCE OF FUNDED PROJECTS.WHEN A FELLOWSHIP IS AWARDED EACH RECIPIENT MUST SUBMIT TWO PROGRESS REPORTS DURING THE COURSE OF THE TWO-YEAR FELLOWSHIP. EACH RECIPIENT MUST ALSO SUBMIT EXPENSE REPORTS DURING THE COURSE OF THE TWO-YEAR FELLOWSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part II, Line 1 - Method of Accounting</FormAndLineReferenceDesc>
        <ExplanationTxt>ACCRUAL METHOD OF ACCOUNTING</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleG documentId="IRS990ScheduleG" softwareId="24020490" softwareVersionNum="2024v5.2">
      <AgrmtProfFundraisingActyInd>false</AgrmtProfFundraisingActyInd>
      <FundraisingEventInformationGrp>
        <Event1Nm>GALA</Event1Nm>
        <GrossReceiptsEvent1Amt>1841488</GrossReceiptsEvent1Amt>
        <CharitableContriEvent1Amt>1841488</CharitableContriEvent1Amt>
        <OtherDirectExpensesEvent1Amt>179339</OtherDirectExpensesEvent1Amt>
        <GrossReceiptsTotalAmt>1841488</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>1841488</CharitableContributionsTotAmt>
        <OthDirectExpnssTotalEventsAmt>179339</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>179339</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>-179339</NetIncomeSummaryAmt>
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    </IRS990ScheduleG>
    <IRS990ScheduleI documentId="IRS990ScheduleI" softwareId="24020490" softwareVersionNum="2024v5.2">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>MASSACHUSETTS GENERAL</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>55 FRUIT STREET</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02114</ZIPCd>
        </USAddress>
        <RecipientEIN>041564655</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>50000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF FLORIDA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>2033 MOWRY ROAD</AddressLine1Txt>
          <CityNm>GAINESVILLE</CityNm>
          <StateAbbreviationCd>FL</StateAbbreviationCd>
          <ZIPCd>32610</ZIPCd>
        </USAddress>
        <RecipientEIN>596002052</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>105000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF ILLINOIS</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>506 S WRIGHT ST</AddressLine1Txt>
          <CityNm>URBANA</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>61801</ZIPCd>
        </USAddress>
        <RecipientEIN>376000511</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>105000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF NEVADA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>4505 MARYLAND PARKWAY</AddressLine1Txt>
          <CityNm>LAS VEGAS</CityNm>
          <StateAbbreviationCd>NV</StateAbbreviationCd>
          <ZIPCd>89154</ZIPCd>
        </USAddress>
        <RecipientEIN>886000024</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>145000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH</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>190000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF WASHINGTON</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>4333 BROOKLYN AVE NE</AddressLine1Txt>
          <CityNm>SEATTLE</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98105</ZIPCd>
        </USAddress>
        <RecipientEIN>916001537</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>50000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNVERSITY OF ALBANY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1400 WASHINGTON AVENUE</AddressLine1Txt>
          <CityNm>ALBANY</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>12222</ZIPCd>
        </USAddress>
        <RecipientEIN>141368361</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>105000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>VIRGINIA COMMONWEALTH UNIVERS</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>921 W FRANKLIN STREET</AddressLine1Txt>
          <CityNm>RICHMOND</CityNm>
          <StateAbbreviationCd>VA</StateAbbreviationCd>
          <ZIPCd>23284</ZIPCd>
        </USAddress>
        <RecipientEIN>546001758</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>42600</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>WAKE FOREST UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>575 N PATTERSON AVE STE 530</AddressLine1Txt>
          <CityNm>WINSTONSALEM</CityNm>
          <StateAbbreviationCd>NC</StateAbbreviationCd>
          <ZIPCd>27101</ZIPCd>
        </USAddress>
        <RecipientEIN>223849199</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>55000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
      </RecipientTable>
      <Total501c3OrgCnt>9</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Grantmaker's Description of How Grants are Used</FormAndLineReferenceDesc>
        <ExplanationTxt>WHEN A GRANT IS AWARDED THERE ARE SUBSTANTIAL AND REGULAR INTERACTIONS BETWEEN GRANTEES AND THE MDF APPOINTED PROJECT ADVISORY COMMITTEE. THE ADVISORY COMMITTEE PROVIDES OVERSIGHT AND GUIDANCE OF FUNDED PROJECTS.WHEN A FELLOWSHIP IS AWARDED EACH RECIPIENT MUST SUBMIT TWO PROGRESS REPORTS DURING THE COURSE OF THE TWO-YEAR FELLOWSHIP. EACH RECIPIENT MUST ALSO SUBMIT EXPENSE REPORTS DURING THE COURSE OF THE TWO-YEAR FELLOWSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="IRS990ScheduleJ" softwareId="24020490" softwareVersionNum="2024v5.2">
      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>false</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>false</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>false</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>false</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>false</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>false</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>false</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ANDREAS ROHRWASSER</PersonNm>
        <TitleTxt>CHIEF SCI. OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>197755</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>7800</DeferredCompensationFlngOrgAmt>
        <TotalCompensationFilingOrgAmt>205555</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>TANYA STEVENSON</PersonNm>
        <TitleTxt>CEO</TitleTxt>
        <BaseCompensationFilingOrgAmt>247799</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>9258</DeferredCompensationFlngOrgAmt>
        <TotalCompensationFilingOrgAmt>257057</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="24020490" softwareVersionNum="2024v5.2">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD IS PROVIDED A COPY OF THE TAX RETURN FOR REVIEW PRIOR TO BEING FINALIZED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE COMMITTEE MONITORS AND ENFORCES COMPLIANCE WITH THE POLICY. THE EXECUTIVE COMMITTEE HAS A FORUM TO RAISE AND ADDRESS ANY POTENTIAL CONFLICTS OF INTEREST AND/OR ANSWER ANY QUESTIONS. MDF MAKES SURE ALL DECISIONS/ACTIONS ARE CLEAR OF CONFLICTS DURING REGULARLY SCHEDULED MEETINGS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>AN INDEPENDENT EMPLOYMENT SEARCH FIRM IS USED ON A CONSULTING BASIS TO PERFORM A MARKET ANALYSIS OF SALARIES AND OTHER COMPENSATION.FOLLOWING THAT ANALYSIS, THE CEO SALARY IS REVIEWED AND APPROVED BY BOTH THE EXECUTIVE COMMITTEE AND THE FULL BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="IRS990ScheduleR" softwareId="24020490" softwareVersionNum="2024v5.2">
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>MDF UK</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <ForeignAddress>
          <AddressLine1Txt>10 QUEEN STREET PLACE</AddressLine1Txt>
          <CityNm>LONDON</CityNm>
          <ProvinceOrStateNm>ECR</ProvinceOrStateNm>
          <CountryCd>UK</CountryCd>
          <ForeignPostalCd>1BE</ForeignPostalCd>
        </ForeignAddress>
        <PrimaryActivitiesTxt>QUALITY OF LIFE OF PEOPLE WITH DM</PrimaryActivitiesTxt>
        <LegalDomicileForeignCountryCd>UK</LegalDomicileForeignCountryCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>MYOTONIC DYSTROPHY FOUNDATION INC</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>true</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>false</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>false</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>false</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>false</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>false</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>false</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>false</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>false</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>false</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>false</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>false</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>false</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>false</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>false</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>false</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>false</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>false</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>false</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>true</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>MDF UK</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>s</TransactionTypeTxt>
        <InvolvedAmt>483385</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>Cash</MethodOfAmountDeterminationTxt>
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