1. Department of Surgery, Division of Cardiovascular Surgery University of Pennsylvania Philadelphia Pennsylvania USA
2. Department of Surgery, Division of Thoracic and Cardiovascular Surgery University of Florida College of Medicine Gainesville Florida USA
3. Department of Surgery, Division of Thoracic and Cardiovascular Surgery University of Virginia Medical Center Charlottesville Virginia USA
4. Department of Surgery, Division of Cardiovascular Surgery University of British Columbia Vancouver British Columbia Canada
5. Department of Surgery, Division of Cardiovascular Surgery Clínica Cardio VID Pontifical Bolivarian University Medellín Colombia
6. Department of Cardiac Surgery Helsinki University Hospital Helsinki Finland
7. St. Vincent's Hospital Sydney Australia
8. The University of Western Australia Western Australia Australia
9. Murdoch University Perth Australia
10. Heart and Lung Research Institute of Western Australia Western Australia Australia
11. The University of New South Wales New South Wales Australia
12. Department of Thoracic and Cardiovascular Surgery Seoul National University Hospital Seoul Republic of Korea
13. Department of Surgery Irrua Specialist Teaching Hospital Irrua Nigeria
14. Department of Surgery, Division of Thoracic Surgery and Interventional Pulmonology Beth Israel Deaconess Medical Center Boston Massachusetts USA