1 Professor of Surgery and Oncology, Hepatobiliary and Pancreatic Surgery, Trauma and Acute Care Surgery, Foothills Medical Center, 1403-29 Street NW, Calgary, Alberta T2N 2T9, Canada.
2 Associate Professor of Surgery, Trauma and Acute Care Surgery, London Health Sciences Centre, 800 Commissioners Rd. E, London, Ontario N6A 5W9, Canada.