This is the ValueSet that contains all the codes in Lab Test - Qualitative Result - SNOMED CT (http://smart.who.int/ddcc/ValueSet/LabTestQualitativeResultSnomedValueSet) and Lab Test - Qualitative Result - SNOMED CT (http://smart.who.int/ddcc/ValueSet/LabTestQualitativeResultSnomedValueSet). E.g. what you have to deal with if you get resources containing codes in either of them