1. Department of Endocrinology and Diabetes (G.S.Y.O., J.P.W., B.G.A.S., S.J.B., J.L.N., E.M.L.), Nedlands 6009, Australia
2. Department of Clinical Biochemistry (G.S.Y.O, E.R., J.L.N., G.N.K., E.M.L.), PathWest Laboratory Medicine, Queen Elizabeth II Medical Centre, Nedlands 6009, Australia
3. School of Medicine and Pharmacology (J.P.W., B.G.A.S.), The University of Western Australia, Crawley 6009, Australia
4. Keogh Institute for Medical Research (B.G.A.S.), Nedlands 6009, Australia
5. Department of Endocrine Surgery (H.H.N.), Sir Charles Gairdner Hospital, Nedlands 6009, Australia