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