This is the ValueSet that contains all the codes in Quốc tịch theo ISO 3166-1 alpha-2 — Country ValueSet for Patient Citizenship (http://fhir.hl7.org.vn/core/ValueSet/vn-country-vs) and Quốc tịch theo ISO 3166-1 alpha-2 — Country ValueSet for Patient Citizenship (http://fhir.hl7.org.vn/core/ValueSet/vn-country-vs). E.g. what you have to deal with if you get resources containing codes in either of them