This is the ValueSet that contains all the codes in SNOMED CT Anatomical Structure for Administration Site Codes (http://hl7.org/fhir/ValueSet/approach-site-codes) and SNOMED CT Anatomical Structure for Administration Site Codes (http://hl7.org/fhir/ValueSet/approach-site-codes). E.g. what you have to deal with if you get resources containing codes in either of them