1. Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy
2. Columbia University College of Physicians & Surgeons (J.P.B.), New York, New York 10032
3. Endocrine Research Unit (D.S.), San Francisco Department of Veterans Affairs Medical Center, University of California, San Francisco, California 94121
4. Clinic and Laboratory of Experimental Endocrinology (R.B.), Gasthuisberg, KU Leuven, 3000 Leuven, Belgium
5. Mayo Clinic (B.C.), Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Rochester, Minnesota 55905
6. Academic Endocrine Unit (R.V.T.), Radcliffe Department of Medicine, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism, Churchill Hospital, Oxford OX3 7LJ, United Kingdom
7. McMaster University Calcium Disorders Clinic (A.A.K.), Hamilton, Canada L8S4L8
8. Massachusetts General Hospital (J.T.P.), Boston, Massachusetts 02114