1. Hypertension Unit (P.M., F.V.), Department of Medicine and Experimental Oncology, University of Torino, 10133 Torino, Italy
2. Hypertension Unit (M.S., R.D.G.), Department of Medicine, University of Queensland, Princess Alexandra and Greenslopes Hospitals, Brisbane, Australia 4212
3. Endocrine Unit (K.-C. L.), Tan Tock Seng Hospital, Singapore, Republic of Singapore 308433
4. Department of Endocrinology (C.E.F., L.M.), Faculty of Medicine, P. Universidad Catòlica de Chile, 114D Santiago, Chile
5. Division of Endocrinology (C.E.G.-S.), University of Mississippi Medical Center, Jackson, Mississippi 39216
6. Division of Endocrinology, Metabolism, Nutrition, and Internal Medicine (W.F.Y.), Mayo Clinic, Rochester, Minnesota 55905