1. Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
2. Division of Cardiac Surgery, Libin Cardiovascular Institute, University of Calgary, Calgary, Alberta, Canada
3. Department of Cardiac Sciences, Kelowna General Hospital, Kelowna, British Columbia, Canada
4. Division of Cardiac Surgery, University of Toronto, Toronto, Ontario, Canada
5. Department of Anesthesia, University of Calgary, Calgary, Alberta, Canada
6. Department of Diagnostic Imaging, University of Calgary, Calgary, Alberta, Canada