This is the CodeSystem that contains codes in both Citation Classification Type (http://terminology.hl7.org/CodeSystem/citation-classification-type) and Citation Classification Type (http://terminology.hl7.org/CodeSystem/citation-classification-type).
Generated Narrative: CodeSystem c51c7c25-f5f4-429e-b1c8-849e59890f2d-690
This code system http://hl7.org/fhir/comparison/CodeSystem/c51c7c25-f5f4-429e-b1c8-849e59890f2d-690 defines codes, but no codes are represented here