This is the ValueSet that contains all the codes in ResearchStudyPrimaryPurposeType (http://hl7.org/fhir/ValueSet/research-study-prim-purp-type) and Research Study Primary Purpose Type (http://hl7.org/fhir/ValueSet/research-study-prim-purp-type). E.g. what you have to deal with if you get resources containing codes in either of them