1 Richard A. and Susan F. Smith Center for Outcomes Research, Division of Cardiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA.
2 Harvard Medical School, Boston, Massachusetts, USA.
3 Richard A. and Susan F. Smith Center for Outcomes Research, Division of Cardiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA; Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA.
4 Harvard Medical School, Boston, Massachusetts, USA; Cardiovascular Associates of America, Celebration, Florida, USA; Massachusetts General Hospital, Boston, Massachusetts, USA.
5 CHRISTUS Health-Heart and Vascular Institute, Tyler, Texas, USA.
6 Richard A. and Susan F. Smith Center for Outcomes Research, Division of Cardiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. Electronic address: ryeh@bidmc.harvard.edu.