Extensible
20141110
(C1442488, UMLS, "Baseline") is (C25213, NCIt, "Baseline"). The undefined (121079, DCM, "Baseline") that is used in CID 7003 Diagnostic Imaging Report Purposes of Reference is not used in this context.
(C3539075, UMLS, "Pretreatment") is (C103341, NCIt, "Pretreatment").
(C1708760, UMLS, "Nadir") is (C43517, NCIt, "Nadir"), and is a synonymn for "lowest", though "nadir" is more commnly used in the context of therapeutic response criteria.