1. Division of Cardiology, Jewish General Hospital, McGill University, Montreal, Quebec, Canada
2. Duke Clinical Research Institute, Durham, North Carolina
3. Duke Clinical Research Institute, Durham, North Carolina3Division of Cardiology, Duke University Medical Center, Durham, North Carolina
4. Division of Cardiac Surgery, University of Florida, Jacksonville
5. Division of Cardiac Surgery, The Heart Hospital Baylor Plano, Plano, Texas
6. Reif Heart Institute, Doylestown Hospital, Doylestown, Pennsylvania7Temple University School of Medicine, Philadelphia, Pennsylvania
7. Division of Cardiac Surgery, University of Colorado Hospital, Aurora
8. Division of Cardiac Surgery, Duke University Medical Center, Durham, North Carolina
9. Division of Cardiac Surgery, Massachusetts General Hospital, Boston