1 Rescu, Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Ontario, Canada2Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
2 Rescu, Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Ontario, Canada.
3 Sunnybrook Centre for Prehospital Medicine, Division of Emergency Medicine, Department of Family and Community Medicine, University of Toronto, Toronto, Ontario, Canada.