This is the ValueSet that contains all the codes in eHDSI Specimen Collection Method (http://terminology.ehdsi.eu/ValueSet/eHDSISpecimenCollectionMethod) and eHDSI Specimen Collection Method (http://terminology.ehdsi.eu/ValueSet/eHDSISpecimenCollectionMethod). E.g. what you have to deal with if you get resources containing codes in either of them