1. Yale School of Medicine; Department of Cardiovascular Medicine; New Haven USA
2. Albert Einstein College of Medicine, Montefiore Medical Center; Montefiore Einstein Center for Heart & Vascular Care; 111 East 210th Street Bronx New York USA 10467
3. Yale School of Medicine; Department of Cardiac Surgery; New Haven USA
4. Albert Einstein College of Medicine; Jacobi Medical Center; New York USA
5. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100
6. Montefiore Medical Center, Albert Einstein College of Medicine; Department of Cardiovascular Disease; Bronx NY USA
7. Yale School of Medicine; Department of Cardiology; New Haven USA
8. Brigham and Women's Hospital, Harvard Medical School; Department of Surgery; 75 Francis Street Boston MA USA 02115
9. Brigham and Women's Hospital; Heart & Vascular Centre; 75 Francis Street Boston MA USA 02115