1. Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital, Minneapolis, Minnesota
2. The Royal Brompton & Harefield NHS Foundation Trust, London, United Kingdom
3. Division of Cardiac Surgery, St Michaels Hospital, University of Toronto, Toronto, Ontario, Canada
4. Cardiovascular Division, University of Michigan, Ann Arbor
5. Washington University School of Medicine, St Louis, Missouri
6. Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, University of Milan, Milan, Italy
7. Tromsø University Hospital, Tromsø, Norway
8. Perelman School of Medicine, University of Pennsylvania, Philadelphia
9. University of Calgary, Calgary, Alberta, Canada
10. Department of Surgery, Medical University of Vienna, Vienna, Austria
11. Brigham and Women’s Hospital, Boston, Massachusetts
12. Department of Cardiovascular Surgery, Hadassah Hebrew University Medical Center, Jerusalem, Israel
13. Massachusetts General Hospital, Boston