1. Faculty of Medicine and Health Sciences, McGill University, Montreal, Canada.
2. Department of Otolaryngology – Head and Neck Surgery, Western University Schulich School of Medicine and Dentistry, London, Canada.
3. Northern Ontario School of Medicine, Sudbury, Canada.
4. Department of Otolaryngology – Head and Neck Surgery, McGill University, Montreal, Canada.
5. Department of Otolaryngology, Children’s National Medical Center, Washington, District of Columbia, USA