1. Richard A. and Susan F. Smith Center for Outcomes Research in Cardiology, Division of Cardiology, Beth Israel Deaconess Medical and Harvard Medical School, Boston, Massachusetts
2. Brigham and Women’s Hospital Heart & Vascular Center, Harvard Medical School, Boston, Massachusetts
3. Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St Louis, Missouri
4. Cardiology Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
5. Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts