This is the ValueSet that contains codes in both 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).