1. From the Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.M.L., C.P.C., J.A.O.)
2. Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, United Kingdom (A.F.D.)
3. Sydney Medical School, University of Sydney and Baker Heart & Diabetes Institute, Melbourne, Australia (G.L.R.J.)
4. The Frist Clinic, Nashville, TN (F.K.V.)
5. Division of Endocrinology and Metabolism, Department of Medicine, University of Virginia Health System, Charlottesville (R.M.C.)
6. Section of Nephrology, Hypertension Program, Department of Internal Medicine, Yale New Haven Hospital Heart & Vascular Center, Yale School of Medicine, CT (A.J.P.).