{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Start date of last menstruation.",
  "system" : "http://hl7.org/fhir/ex-onsettype",
  "property" : [ ],
  "codesystem" : "cf845214-cf9f-5de2-84e9-82bc58b41583",
  "concept_id" : "3c128768-986b-5cbe-8e2f-70ef129a6aa6",
  "ancestors" : {
    "lmn" : 0
  },
  "id" : "3b7f2db5-7af5-4d95-a75c-5fa772fee342",
  "code" : "lmn",
  "display" : "Last Menstruation",
  "version" : "4.0.1"
}