This is the ValueSet that contains all the codes in Alleviating Factor Codes (http://hl7.org/fhir/uv/symptoms/ValueSet/AlleviatingFactorCodes) and Alleviating Factor Codes (http://hl7.org/fhir/uv/symptoms/ValueSet/AlleviatingFactorCodes). E.g. what you have to deal with if you get resources containing codes in either of them