{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Definition:The event occurred so that a test or observation performed at a prior event could be performed again due to conditions set forth in the protocol.",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-ActReason",
  "property" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "_ClinicalResearchEventReason"
  } ],
  "codesystem" : "eb6e9d71-f508-5fd3-a488-c4598109efc0",
  "concept_id" : "815f401a-39b7-5a32-a6ed-3d03d42f46ff",
  "ancestors" : {
    "RET" : 0,
    "_ClinicalResearchEventReason" : 1
  },
  "id" : "5858e0e1-df51-48bf-83c6-d8f486663160",
  "code" : "RET",
  "display" : "retest",
  "version" : "2018-08-12"
}