Intersection of http://smart.who.int/trust/ValueSet/WHORegionalOffices and http://smart.who.int/trust/ValueSet/WHORegionalOffices
This is the ValueSet that contains codes in both WHO Regional Offices (http://smart.who.int/trust/ValueSet/WHORegionalOffices) and WHO Regional Offices (http://smart.who.int/trust/ValueSet/WHORegionalOffices).