This is the ValueSet that contains all the codes in eHDSI Laboratory Report Types (http://terminology.ehdsi.eu/ValueSet/eHDSILaboratoryReportTypes) and eHDSI Laboratory Report Type (http://terminology.ehdsi.eu/ValueSet/eHDSILaboratoryReportType). E.g. what you have to deal with if you get resources containing codes in either of them