{
  "package" : "hl7.fhir.r5.core@5.0.0",
  "definition" : "A study design process in which all parties influencing study enrollment and allocation to study groups are unaware of the group assignment for the study participant at the time of enrollment and allocation.",
  "system" : "http://hl7.org/fhir/study-design",
  "property" : [ ],
  "codesystem" : "bb32c5f8-166a-5db4-919c-9554be080f5c",
  "concept_id" : "9ee95c99-fbce-56da-aa5d-c53c5a94f9e6",
  "ancestors" : {
    "SEVCO:01064" : 0
  },
  "id" : "3e94eaba-ef0b-4190-98e6-e5e0cc8f4ba8",
  "code" : "SEVCO:01064",
  "display" : "Allocation concealment",
  "designation" : [ {
    "use" : {
      "display" : "Alternative term"
    },
    "value" : "Blinding of randomization assignment"
  }, {
    "use" : {
      "display" : "Alternative term"
    },
    "value" : "Masking of randomization assignment"
  } ],
  "version" : "5.0.0"
}