aScarborough Health Network

bSchulich Heart Program, Sunnybrook Health Sciences Center

cTerrence Donnelly Heart Center, St. Michael's Hospital, Unity Health Toronto

dPeter Munk Cardiac Centre, University Health Network, Toronto, Canada

Correspondence to Akshay Bagai, MD, MHS, Terrence Donnelly Heart Center, St. Michael's Hospital, University of Toronto, ON M5B1W8, Canada. Tel: +1 416 864 6060 x5783; fax: +1 416 864 5989; e-mail: [email protected]