1. Department of Otolaryngology-Head and Neck Surgery, Temerty Faculty of Medicine, St. Michael's Hospital, University of Toronto, 30 Bond Street, Unit 8-163 CC North, M5B 1W8, Toronto, ON, Canada
2. Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada
3. Department of Otolaryngology-Head and Neck Surgery, Eastern Virginia Medical School, Norfolk, VA, USA
4. Division of Otolaryngology-Head and Neck Surgery, Centre Hospitalier de L'University de Montreal, Montreal, QC, Canada