1 Division of Cardiac Surgery, University of Toronto, Toronto, Ontario, Canada; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada. Electronic address: vervoortdominique@hotmail.com.
2 Division of Cardiac Surgery, Jena University Hospital, Friedrich Schiller University, Jena, Germany.
3 Division of Cardiac Surgery, University of Toronto, Toronto, Ontario, Canada; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Schulich Heart Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.