1. From the Division of Endocrinology, Diabetes, and Hypertension (J.M.B., J.S.W., R.G., A.E.G., L.H.P., G.H.W., G.K.A., A.V.) and Department of Surgery (D.T.R.), Brigham and Women’s Hospital and Harvard Medical School, Boston, MA; and Departments of Medicine and Pharmacology, Vanderbilt University Medical Center, Nashville, TN (J.M.L.).