aDivision of Thoracic Surgery, University of Toronto, Toronto

bDivision of Thoracic Surgery, University of Alberta, Edmonton, Alberta, Canada

cAssistant Professor, Division of Thoracic and Foregut Surgery, University of Minnesota, Minneapolis, Minnesota, USA

Correspondence to Ilitch Diaz-Gutierrez, MD FACS, Assistant Professor of Surgery, Department of Surgery, Division of Thoracic and Foregut Surgery, University of Minnesota, Minneapolis, MN, 420 Delaware St SE, MMC 207, Minneapolis, MN 55455, USA. Tel: +1 612 625 0998; e-mail: [email protected]