1. Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
2. Department of Otolaryngology-Head and Neck Surgery, London Health Sciences Centre, London, ON, Canada
3. Division of Otolaryngology, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
4. Department of Otolaryngology-Head & Neck Surgery, University of Toronto, Toronto, ON, Canada