{
  "package" : "hl7.fhir.r5.core@5.0.0",
  "definition" : "A comparative study design in which participants receive two or more alternative exposures during separate periods of time.",
  "system" : "http://hl7.org/fhir/study-design",
  "property" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#child",
    "code" : "child",
    "_implicit" : true,
    "valueCode" : "SEVCO:01025"
  }, {
    "_uri" : "http://hl7.org/fhir/concept-properties#child",
    "code" : "child",
    "_implicit" : true,
    "valueCode" : "SEVCO:01024"
  }, {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "SEVCO:01010"
  } ],
  "codesystem" : "bb32c5f8-166a-5db4-919c-9554be080f5c",
  "concept_id" : "44e5f44b-b35a-547b-8958-7ab213c8b1ad",
  "ancestors" : {
    "SEVCO:01010" : 1,
    "SEVCO:01012" : 0
  },
  "id" : "0e916e77-2a2e-4b29-9491-9ee63a8e6bc9",
  "code" : "SEVCO:01012",
  "display" : "Crossover cohort design",
  "designation" : [ {
    "use" : {
      "display" : "Alternative term"
    },
    "value" : "Crossover study"
  }, {
    "use" : {
      "display" : "Alternative term"
    },
    "value" : "Crossover trial"
  } ],
  "version" : "5.0.0"
}