1 Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Division of Cardiovascular Surgery, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.
2 Division of Cardiovascular Surgery, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.
3 Schulich Heart Program, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.
4 Division of Cardiovascular Surgery, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada. Electronic address: bobby.yanagawa@unityhealth.to.