1. Department of Otolaryngology—Head and Neck Surgery, McGill University Health Centre, Montreal, Quebec, Canada
2. Department of Pathology, McGill University Health Centre, Montreal, Quebec, Canada
3. Department of Pathology, Montreal Children’s Hospital, McGill University Health Centre, Montreal, Quebec, Canada
4. Department of Pediatric Otolaryngology, Montreal Children’s Hospital, McGill University Health Centre, Montreal, Quebec, Canada