{
  "package" : "hl7.terminology.r4@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" : "6985d059-7d29-5989-b3b1-dbfd4a8dfb3e",
  "concept_id" : "adfb9215-a80e-5a21-adc9-b6152ed541ca",
  "ancestors" : {
    "unknown" : 0
  },
  "id" : "6851bf1c-ef96-4c86-a715-e5cdaac53ade",
  "code" : "unknown",
  "display" : "Unknown",
  "version" : "1.0.0"
}