1. From the Divisions of Cardiac Surgery (M.A.Z., J.A.Q., M.H.) and Cardiology (D.L.B., J.M.G.), Veterans Affairs (VA) Boston Healthcare System and Harvard Medical School, the Department of Surgery, Brigham and Women’s Hospital and Harvard Medical School (M.A.Z., J.A.Q., M.H.), Brigham and Women’s Hospital Heart and Vascular Center and Harvard Medical School (D.L.B.), and Massachusetts General Hospital (J.B.) — all in Boston; the Departments of Thoracic and Cardiovascular Surgery, Heart and Vascular...