| Affiliation: | 1. Cardiology Division, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts;2. Melbourne Medical School, The University of Melbourne, Victoria, Australia;3. Division of Cardiology, University of Vermont College of Medicine, Burlington, Vermont;4. University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania;5. Biostatistics Center, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts;6. Department of Cardiovascular Medicine, Catholic University of the Sacred Heart, Rome, Italy |
