1. Richard A. and Susan F. Smith Center for Cardiovascular Outcomes Research, Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Boston, MA (J.B.S., Y.Z., C.S., M.C., D.S.P., J.J.P., R.W.Y.).
2. Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston (M.C.).
3. Saint Luke’s Mid-America Heart Institute, Department of Medicine, Division of Cardiology, University of Missouri-Kansas City School of Medicine (D.J.C.).