1. Department of Cardio-Thoracic Surgery, Weill Cornell Medicine, New York City, NY (M.G., A.D.F.).
2. Department of Thoracic and Cardiovascular Surgery, Cleveland Clinic, OH (F.B.).
3. Herzzentrum Leipzig, Germany (P.D.).
4. Schulich Heart Centre, Sunnybrook Health Science, University of Toronto, Ontario, Canada (S.E.F.).
5. Lenox Hill Hospital, New York City, NY (N.P.).
6. Department of Cardiovascular Surgery, Icahn School of Medicine at Mount Sinai, New York City, NY (J.D.P., G.T.).
7. Division of Cardiac Surgery, University of Ottawa Heart Institute, Ontario, Canada (M.R.).
8. Sydney Medical School, University of Sydney, Australia (M.V.).
9. University of Oxford, United Kingdom (D.P.T.).