1 Division of Cardiac Surgery, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada. Electronic address: bobby.yanagawa@unityhealth.to.
2 Division of Cardiac Surgery, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.
3 Department of Otolaryngology-Head & Neck Surgery, Health Sciences Centre, University of Manitoba, Manitoba, Winnipeg, Canada.
4 Division of Cardiac Surgery, Royal Jubilee Hospital, Victoria, British Columbia, Canada.
5 Division of Cardiac Surgery, New Brunswick Heart Centre, Saint John, New Brunswick, Canada.
6 Division of Cardiac Surgery, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada.
7 Division of Cardiovascular Surgery, St. Mary's General Hospital, Kitchener, Ontario, Canada.
8 Department of Surgery, Section of Cardiac Surgery, Max Rady College of Medicine, University of Manitoba, Manitoba, Winnipeg, Canada.