1. Department of Surgery, The Ottawa Hospital University of Ottawa Ottawa Ontario Canada
2. Clinical Epidemiology Program Ottawa Hospital Research Institute Ottawa Ontario Canada
3. Faculty of Medicine University of Ottawa Ottawa Ontario Canada
4. Department of Anesthesia CHU de Québec ‐ Université Laval Quebec City Quebec Canada
5. Departments of Anesthesiology and Pain Medicine, The Ottawa Hospital University of Ottawa Ottawa Ontario Canada
6. Department of Medicine, The Ottawa Hospital University of Ottawa Ottawa Ontario Canada
7. Canadian Blood Services Ottawa Ontario Canada
8. Department of Surgery University of Toronto Toronto Ontario Canada
9. Division of Surgical Oncology Odette Cancer Centre ‐ Sunnybrook Health Sciences Centre Toronto Ontario Canada