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      <DonatedServicesUseFcltsAmt>0</DonatedServicesUseFcltsAmt>
      <PriorYearAdjustmentsAmt>0</PriorYearAdjustmentsAmt>
      <LossesReportedAmt>0</LossesReportedAmt>
      <OtherExpensesIncludedAmt>0</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>1437564</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>0</InvestmentExpensesNotIncld2Amt>
      <OtherExpensesNotIncludedAmt>0</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>1437564</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part V, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization is using the quasi-endowment funds liquidated in 2020 in specific program initiatives.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="R000006" softwareId="24021167" softwareVersionNum="v1.00">
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>Europe (including Iceland and Greenland)</RegionTxt>
        <PurposeOfGrantTxt>To support a better understanding of the interaction between the SHANK3 gene and the HNRNPK gene. Many individuals with Phelan McDermid syndrome either have only one copy of the SHANK3 gene or have an identified mutation in their second copy of the gene, impacting the formation and function of neuronal synapses. Supported research study hopes to better understand the interaction between these two genes and assess the novel role of SHANK3 in the nucleus as well as to provide valuable insights and offer new directions for potential therapies that go beyond the role of SHANK3 at the synapse.</PurposeOfGrantTxt>
        <CashGrantAmt>55000</CashGrantAmt>
        <MannerOfCashDisbursementTxt>Wire transfer</MannerOfCashDisbursementTxt>
        <DescriptionOfNonCashAsstTxt>See part V</DescriptionOfNonCashAsstTxt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>1</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
    </IRS990ScheduleF>
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      <FundraisingEventInformationGrp>
        <Event1Nm>Phelan Lucky</Event1Nm>
        <GrossReceiptsEvent1Amt>146292</GrossReceiptsEvent1Amt>
        <CharitableContriEvent1Amt>41575</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>104717</GrossRevenueEvent1Amt>
        <CashPrizesEvent1Amt>0</CashPrizesEvent1Amt>
        <NonCashPrizesEvent1Amt>0</NonCashPrizesEvent1Amt>
        <RentFacilityCostsEvent1Amt>0</RentFacilityCostsEvent1Amt>
        <FoodAndBeverageEvent1Amt>0</FoodAndBeverageEvent1Amt>
        <EntertainmentEvent1Amt>0</EntertainmentEvent1Amt>
        <OtherDirectExpensesEvent1Amt>0</OtherDirectExpensesEvent1Amt>
        <FoodAndBeverageOtherEventsAmt>0</FoodAndBeverageOtherEventsAmt>
        <EntertainmentOtherEventsAmt>0</EntertainmentOtherEventsAmt>
        <GrossReceiptsTotalAmt>146292</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>41575</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>104717</GrossRevenueTotalEventsAmt>
        <CashPrizesTotalEventsAmt>0</CashPrizesTotalEventsAmt>
        <NonCashPrizesTotalEventsAmt>0</NonCashPrizesTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>0</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>0</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>0</EntertainmentTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>0</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>0</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>104717</NetIncomeSummaryAmt>
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    </IRS990ScheduleG>
    <IRS990ScheduleI documentId="R000008" softwareId="24021167" softwareVersionNum="v1.00">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Boston Children's Hospital</BusinessNameLine1Txt>
          <BusinessNameLine2Txt>Children's Hospital Corporation</BusinessNameLine2Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>300 Longwood Avenue</AddressLine1Txt>
          <CityNm>Boston</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02115</ZIPCd>
        </USAddress>
        <RecipientEIN>042774441</RecipientEIN>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>116392</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>To support the conclusion of the second phase of the Developmental Synaptopathies Consortium's Phelan-McDermid syndrome natural history study, including Boston Children's Hospital personnel costs and subawards to Icahn Mount Sinai Medical Center and Rush University for personnel costs as well.</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Northeastern University</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>360 Huntington Avenue</AddressLine1Txt>
          <CityNm>Boston</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02115</ZIPCd>
        </USAddress>
        <RecipientEIN>041679980</RecipientEIN>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>55000</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>To support a project seeking to expand a new natural communication sampling protocol called ROSCO (Rapid Online Sample of Communication). ROSCO is designed to elicit meaningful samples of communication from individuals with Phelan McDermid syndrome via online-video platforms like Zoom in approximately 15 minutes. This study will validate the ROSCO paradigm with the Phelan McDermid syndrome population longitudinally, using repeated samples to establish reliability and sensitivity to communication change over time.</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Seaver Autism Center</BusinessNameLine1Txt>
          <BusinessNameLine2Txt>Icahn School of Medicine at Mount Sinai</BusinessNameLine2Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1 Gustave L Levy Place</AddressLine1Txt>
          <AddressLine2Txt>Box 1230</AddressLine2Txt>
          <CityNm>New York</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10029</ZIPCd>
        </USAddress>
        <RecipientEIN>136171197</RecipientEIN>
        <IRCSectionDesc>501(c)(3)</IRCSectionDesc>
        <CashGrantAmt>100000</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>To fund the further development of the Phelan-McDermid syndrome Inventory for Psychiatric Symptoms (PIPS) tool, to better support individuals with Phelan McDermid syndrome and their caregivers with managing and intervening in neuropsychiatric episodes experienced by these individuals.</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>3</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule I, Part I, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization has a chief science officer and scientific advisory committee that review all grant requests and grant contract awards. The deliverables and expectations set forth in the executed awards may vary according to the size and circumstances of the grant contract. All funds must be used for the benefit or programs that support individuals with Phelan-McDermid syndrome and their families.</ExplanationTxt>
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    <IRS990ScheduleO documentId="R000009" softwareId="24021167" softwareVersionNum="v1.00">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990 and any required supplemental schedules are reviewed in draft form by the finance committee. Finance committee approves and recommends that the board accept the draft of the 990. Board members are provided a draft of the 990 and allowed one week to comment, request changes, and ask questions, after which time the 990 is filed electronically.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Board members, committee chairs, and other key volunteers and employees are required to sign an annual statement acknowledging they have received a written conflict of interest policy and are in compliance with the policy.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>Board determines compensation of Chief Executive Officer as part of annual budgeting process for entire organization. Salary of CEO falls within range that would be considered reasonable, given comparability data of other similar organizations. Board president performs annual review of CEO. Note that independent review and approval as well as comparability data in board minutes whenever a salary change is made. CEO determines compensation of other key staff as part of annual budgeting process for entire organization. Salary of these staff fall within the range that would be considered reasonable given comparability data of other similar organizations.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization makes its audited financial statements and form 990s available on its website. Other documents are made available upon request.</ExplanationTxt>
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