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 f90bd0a2-fe48-4d1e-ba12-6375efeecd69-48
This code system http://hl7.org/fhir/comparison/CodeSystem/f90bd0a2-fe48-4d1e-ba12-6375efeecd69-48 defines codes, but no codes are represented here