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 2c77c26f-0eba-4543-89eb-09eda3cba01c-573
This code system http://hl7.org/fhir/comparison/CodeSystem/2c77c26f-0eba-4543-89eb-09eda3cba01c-573
defines codes, but no codes are represented here