{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : null,
  "system" : "http://terminology.hl7.org/CodeSystem/v2-0376",
  "property" : [ ],
  "codesystem" : "9a4bc233-0dfa-5d5b-8e6e-db413dc9b25a",
  "concept_id" : "83082e18-4569-50a1-accc-88e90741a8b2",
  "ancestors" : {
    "CREF" : 0
  },
  "extension" : [ {
    "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
    "valueString" : "Critical refrigerated -  must not be allowed to freeze or warm until immediately prior to testing"
  } ],
  "id" : "d9545b3d-4a09-4dee-8530-0983c244dbf3",
  "code" : "CREF",
  "display" : "Critical refrigerated temperature",
  "version" : "2.9"
}