This is the ValueSet that contains all the codes in Specimen Additive (http://hl7.eu/fhir/laboratory/ValueSet/lab-specimenAdditive-eu-lab) and Specimen Additive (http://hl7.eu/fhir/laboratory/ValueSet/lab-specimenAdditive-eu-lab). E.g. what you have to deal with if you get resources containing codes in either of them