1. University Clinic of Medicine B (G.H.), CH-4031 Basel, Switzerland;
2. Division of Endocrinology (J.J.S., C.M., C.M., M.G.), CH-4031 Basel, Switzerland;
3. Department of Medicine and Central Laboratories (P.H.), University Hospital Basel, CH-4031 Basel, Switzerland;
4. Brigham and Women’s Hospital and Harvard Medical School (L.E.B.), Boston, Massachusetts 02118