This is the ValueSet that contains all the codes in Mã trả lời KSK — Không đều, Đều (ValueSet VNKSKMenstrualRegularityVS) (http://fhir.hl7.org.vn/core/ValueSet/vn-ksk-menstrual-regularity-vs) and Mã trả lời KSK — Không đều, Đều (ValueSet VNKSKMenstrualRegularityVS) (http://fhir.hl7.org.vn/core/ValueSet/vn-ksk-menstrual-regularity-vs). E.g. what you have to deal with if you get resources containing codes in either of them