1. Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
2. Faculty of Medicine, Queen's University, Kingston, ON, Canada
3. Schulich School of Medicine and Dentistry, London, ON, Canada
4. Division of Pediatric Surgery, Children's Hospital at London Health Sciences Center, Schulich School of Medicine, London, ON, Canada
5. Department of Otolaryngology-Head and Neck Surgery, Children's Hospital at London Health Sciences Center, Schulich School of Medicine, 800 Commissioners Road E, N6A 5W9, London, ON, Canada