1 Richard A. and Susan F. Smith Center for Cardiovascular Outcomes Research, Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts. Electronic address: jstrom@bidmc.harvard.edu.
2 Cardiology Division, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.
3 Department of Cardiology, Houston Methodist Hospital, Weill Cornell Medical College, Houston, Texas.
4 The Robert and Suzanne Tomsich Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland Clinic Lerner College of Medicine, Cleveland, Ohio.
5 Departments of Medicine (Cardiovascular Division) and Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts.