From the Department of Medicine (Z.D.G., B.A.Y.), Pathology and Laboratory Services and Department of Pathology (R.F.N.), and the Division of Nephrology (B.A.Y.), Veterans Affairs Puget Sound Health Care System and the University of Washington School of Medicine, Seattle; the American College of Physicians, Philadelphia (S.E.W.); and the Ann Arbor Veterans Affairs Medical Center and the Department of Internal Medicine and Patient Safety Enhancement Program, University of Michigan Health System — both in Ann Arbor (S.S.). Address reprint requests to Dr. Goldberger at the University of Michigan Health System, Department of Internal Medicine, Division of Cardiovascular Medicine, CVC Cardiovascular Medicine, 1500 E. Medical Center Dr. SPC 5853, Ann Arbor, MI 48109, or at zgoldber@ med.umich.edu.