aDivision of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, Ontario, Canada

bDepartment of Cardiovascular Surgery, University Heart Center Freiburg, Bad Krozingen, Germany

cFaculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada

dDepartment of Cardiac Surgery, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA

Correspondence to Vincent Chan, MD, MPH, FRCRC, Associate Professor, Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin St, Ottawa, ON, Canada K1Y 4W7. Tel: +1 613 696 7294; fax: +1 613 696 7302; e-mail: [email protected]