A revival of the “short” Ca stimulation test (11) was introduced into clinical practice by Doyle et al. (20) who compared Pg-stimulated CT (Pg-sCT) and Ca-stimulated CT (Ca-sCT) concentrations for nonsmoking healthy adults without evidence of thyroid disorders to determine reference ranges of bCT as well as Pg-sCT and Ca-sCT concentrations. Here, JUP is linked to thyroid gland disorder.