1. From the Department of Medicine (S.V.B., O.G., J.C., M.S.G.), Division of Nephrology and Renal Research Institute, and Department of Pharmacology (F.Z., N.T., A.N., M.S.G.), New York Medical College, Valhalla, NY; and Department of Pharmacology (M.C., S.S.G.), Weill Medical College of Cornell University, New York, NY.