This is the CodeSystem that contains codes in both AdverseEventSeriousness (http://terminology.hl7.org/CodeSystem/adverse-event-seriousness) and AdverseEventSeriousness (http://terminology.hl7.org/CodeSystem/adverse-event-seriousness).
Generated Narrative: CodeSystem d90c6776-070a-4707-b535-0a35f2e2298a-576
This code system http://hl7.org/fhir/comparison/CodeSystem/d90c6776-070a-4707-b535-0a35f2e2298a-576 defines codes, but no codes are represented here