{
  "package" : "hl7.fhir.r5.core@5.0.0",
  "definition" : "A randomized assignment in which participants are stratified into groups based on prognostic variables and then randomized into balanced treatment groups",
  "system" : "http://hl7.org/fhir/study-design",
  "property" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "SEVCO:01003"
  } ],
  "codesystem" : "bb32c5f8-166a-5db4-919c-9554be080f5c",
  "concept_id" : "6c9ee0a7-d51a-5b3a-ac2f-249ee1815ca9",
  "ancestors" : {
    "SEVCO:01001" : 2,
    "SEVCO:01003" : 1,
    "SEVCO:01007" : 0
  },
  "id" : "a4ac6e16-9bd0-4038-9e7a-d3d1c2a30fcf",
  "code" : "SEVCO:01007",
  "display" : "stratified randomization",
  "version" : "5.0.0"
}