{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "observational study comparing cohorts.",
  "system" : "http://terminology.hl7.org/CodeSystem/study-type",
  "property" : [ ],
  "codesystem" : "ea20290d-51ad-5f9f-9bae-03810e134550",
  "concept_id" : "7bd6ebf7-49ca-52bb-a372-fbd726cb5002",
  "ancestors" : {
    "cohort" : 0
  },
  "id" : "0ac21073-698f-44a9-bd23-3e2b7e9c3b9a",
  "code" : "cohort",
  "display" : "comparative cohort study",
  "version" : "4.0.1"
}