This is the ValueSet that contains all the codes in KLFunktionsevneniveauFFB (http://fhir.kl.dk/term/ValueSet/KLSeveritiesFFB) and KLFunktionsevneniveauFFB (http://fhir.kl.dk/term/ValueSet/KLSeveritiesFFB). E.g. what you have to deal with if you get resources containing codes in either of them