This is the ValueSet that contains all the codes in IVR valueset pre-treatment type (.143.11.13) (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-preTreatType) and IVR Pretreatment Type (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-preTreatType). E.g. what you have to deal with if you get resources containing codes in either of them