1. Department of Emergency Medicine, Queen’s University, Kingston, Canada;
2. Royal College of Physicians and Surgeons of Canada, Ottawa, Canada;
3. Department of Surgery, University of Toronto, Toronto, Canada;
4. Department of Otolaryngology - Head and Neck Surgery, University of Toronto, Toronto, Canada;
5. Department of Emergency Medicine, University of Ottawa, Ottawa, Canada;
6. Department of Medicine, University of Alberta, Edmonton, Canada