{
  "package" : "hl7.terminology.r5@6.3.0",
  "definition" : "The clinical certainty that the reaction was caused by the identified substance is unknown.  It is an explicit assertion that certainty is not known.",
  "system" : "http://terminology.hl7.org/CodeSystem/reaction-event-certainty",
  "property" : [ ],
  "codesystem" : "69d2c976-700d-52dd-b609-aa88313eca16",
  "concept_id" : "adfb9215-a80e-5a21-adc9-b6152ed541ca",
  "ancestors" : {
    "unknown" : 0
  },
  "id" : "8db19d1b-0ba1-4af2-b0c3-f70e99efcc8b",
  "code" : "unknown",
  "display" : "Unknown",
  "version" : "1.0.0"
}