1. Division of Cardiac Surgery (R.V.R., D.Y.T., R.K., R.N., S.E.F.), University of Toronto, Ontario, Canada.
2. Schulich Heart Centre, Department of Surgery, Sunnybrook Health Sciences Centre, and Institute of Health Policy, Management, and Evaluation (D.Y.T., R.K., S.E.F.), University of Toronto, Ontario, Canada.
3. Cardiovascular Program, Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada (J.F., J.V.T.).
4. Division of Cardiology (J.V.T.), University of Toronto, Ontario, Canada.
5. Department of Cardio-Thoracic Surgery, Weill Cornell Medicine, New York (M.G.).
6. Division of Cardiac Surgery, Royal Melbourne Hospital, Parkville, Victoria, Australia (A.R.).