1. Division of Endocrinology, Diabetes, and Hypertension (B.S., B.C., J.S.W., A.W.K., G.H.W.), Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
2. Channing Laboratory (J.L.-S., B.A.R.), Brigham and Women's Hospital, Boston, Massachusetts 02115
3. Cardiovascular Genetics Research (P.N.H.), Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah 84132
4. Centre d'Investigation Clinique (X.J.), Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche en Santé 970, Université Paris Descartes, 75014 France; Paris, France
5. Department of Internal Medicine and Public Health (C.F.), University of L'Aquila, 67100 L'Aquila, Italy