From the Department of Medicine, Division of Intensive Care Medicine, and the Division of Nephrology, Washington, DC, Veterans Affairs Medical Center (L.S.C.), and the Department of Anesthesiology and Critical Care Medicine (L.S.C.) and Department of Medicine, Division of Renal Diseases and Hypertension (L.S.C., P.L.K.), George Washington University Medical Center — both in Washington, DC; and the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), National Institutes of Health (NIH), Bethesda, MD (P.W.E., R.A.S., P.L.K.).