1. Header
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       CDA AssignedEntity (2.16.840.1.113883.10.12.153)
      1. *
         CDA Person (2.16.840.1.113883.10.12.152)
      2. *
         CDA Organization (2.16.840.1.113883.10.12.151)
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       CDA AssignedEntity (2.16.840.1.113883.10.12.153)
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         CDA Person (2.16.840.1.113883.10.12.152)
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         CDA Organization (2.16.840.1.113883.10.12.151)