Intersection of http://hl7.org/fhir/ValueSet/observation-category and http://terminology.ehdsi.eu/ValueSet/eHDSIObservationCategory
This is the ValueSet that contains codes in both Observation Category Codes (http://hl7.org/fhir/ValueSet/observation-category) and eHDSI Observation category (http://terminology.ehdsi.eu/ValueSet/eHDSIObservationCategory).