{
  "package" : "hl7.fhir.r5.core@5.0.0",
  "definition" : "The time of enrollment for the study participant",
  "system" : "http://hl7.org/fhir/evidence-variable-event",
  "property" : [ ],
  "codesystem" : "226c1761-ddf1-5a0a-bf5b-1ae51d67589a",
  "concept_id" : "150c946b-1bfb-5fd6-a4be-354f960ec18e",
  "ancestors" : {
    "study-start" : 0
  },
  "id" : "9ae083fc-fbdd-44a6-acab-bb9c14bf24f6",
  "code" : "study-start",
  "display" : "Study Start",
  "version" : "5.0.0"
}