This is the CodeSystem that contains all the codes in Body Site CodeSystem (https://www.ehealth.fgov.be/standards/fhir/core-clinical/CodeSystem/be-cs-bodysite) and Body Site CodeSystem (https://www.ehealth.fgov.be/standards/fhir/core-clinical/CodeSystem/be-cs-bodysite). E.g. what you have to deal with if you get resources containing codes in either of them