This is the ValueSet that contains all the codes in Reason for switch to second-line regimen ValueSet (http://smart.who.int/hiv/ValueSet/HIV.D.DE486) and Reason for switch to second-line regimen ValueSet (http://smart.who.int/hiv/ValueSet/HIV.D.DE486). E.g. what you have to deal with if you get resources containing codes in either of them