1. From the Department of Pharmacology, Addiction Science, and Toxicology, College of Medicine, University of Tennessee HSC, Memphis (C.Y.S., P.S., M.M., J.S.S., J.L., S.R.D., K.U.M.)
2. Laboratory of Metabolism, National Cancer Institute, Bethesda, MD (F.J.G.)
3. Renal Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (J.V.B.).