1. From the Division of Clinical Pharmacology (L.X., L.S.d.C., L.C., D.G.H.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
2. Department of Pharmacology and Toxicology, American University of Beirut, Lebanon (H.A.I.).
3. Division of Nephrology and Hypertension (R.M.B.), Department of Medicine, Vanderbilt University Medical Center, Nashville, TN