{
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  "definition" : null,
  "system" : "http://terminology.hl7.org/CodeSystem/v2-0550",
  "property" : [ ],
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  "concept_id" : "581f57fb-2bea-5b0d-9ba5-6d231f60d618",
  "ancestors" : {
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  "display" : "Medullary",
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}