This is the ValueSet that contains all the codes in Reason for switch to third-line regimen ValueSet (http://smart.who.int/hiv/ValueSet/HIV.D.DE492) and Reason for switch to third-line regimen ValueSet (http://smart.who.int/hiv/ValueSet/HIV.D.DE492). E.g. what you have to deal with if you get resources containing codes in either of them