Source:http://linkedlifedata.com/resource/umls/id/C1708226
NCI: A role used to designate the type of biomarker a gene is; it points to a small tree of biomarker types (e.g., Disease Marker, Metabolic Marker, Prognostic Marker). The domain and range for this role are 'Gene' and 'Diagnostic or Prognostic Factor', respectively.