This is the ValueSet that contains all the codes in Closure Type Terminology (http://hl7.org/fhir/us/pq-cmc-fda/ValueSet/pqcmc-closure-type-terminology) and Closure Type Terminology (http://hl7.org/fhir/us/pq-cmc-fda/ValueSet/pqcmc-closure-type-terminology). E.g. what you have to deal with if you get resources containing codes in either of them