aDivision of Cardiac Surgery

bDivision of Cardiovascular Surgery, Peter Munk Cardiac Center, Department of Surgery, University of Toronto, Toronto, Ontario, Canada

cDepartment of Cardiovascular Surgery, Mount Sinai Hospital, Icahn School of Medicine at Mount Sinai, New York, New York, USA

Correspondence to Ismail El-Hamamsy, MD, PhD, Department of Cardiovascular Surgery, Mount Sinai Hospital, 1190, Fifth Avenue, New York, NY 10029, USA. Tel: +1 212 659 6087; fax: +1 514 593 2157; e-mail: [email protected]