This is the ValueSet that contains all the codes in Oxygen Saturation Body Location value set (https://hl7.fr/ig/fhir/core/ValueSet/fr-core-vs-spo2-body-location) and Oxygen Saturation Body Location value set (https://hl7.fr/ig/fhir/core/ValueSet/fr-core-vs-spo2-body-location). E.g. what you have to deal with if you get resources containing codes in either of them