1. Department of Otolaryngology Head and Neck Surgery Jewish General Hospital McGill University Montreal Quebec Canada
2. Department of Otolaryngology‐Head and Neck Surgery Sunnybrook Health Sciences Center Toronto Ontario Canada
3. Department of Otolaryngology‐Head and Neck Surgery Princess Margaret Cancer Center‐University Health Network University of Toronto Toronto Ontario Canada
4. Department of Radiation Oncology Princess Margaret Cancer Center‐University Health Network University of Toronto Toronto Ontario Canada
5. Division of Otolaryngology‐Head and Neck Surgery University of Alberta Edmonton Alberta Canada
6. Department Otolaryngology‐Head and Neck Surgery University of Calgary Calgary Alberta Canada
7. Department of Otolaryngology‐Head and Neck Surgery Centre Hospitalier de l’Université de Montreal (CHUM) Université de Montreal Montreal Quebec Canada
8. Department of Radiation Oncology CHUM Université de Montreal Montreal Quebec Canada
9. Department of Otolaryngology‐Head and Neck Surgery The Ottawa Hospital University of Ottawa Ottawa Ontario Canada
10. Department of Radiation Oncology The Ottawa Hospital University of Ottawa Ottawa Ontario Canada
11. Department of Otolaryngology‐Head and Neck Surgery and Oncology London Health Sciences Center London Ontario Canada
12. Department of Radiation Oncology Sunnybrook Health Sciences Center Toronto Ontario Canada
13. Department of Otolaryngology‐Head and Neck Surgery University of Florida Health Shands Hospital University of Florida Gainesville Florida USA
14. Institute of Head and Neck Diseases Evangelical Hospital Vienna Austria
15. Department of Otorhinolaryngology, Head and Neck Surgery Medical University of Vienna Vienna Austria
16. Department of Otolaryngology‐Head and Neck Surgery Mount Sinai Hospital University of Toronto Toronto Ontario Canada
17. Department of Otolaryngology‐Head and Neck Surgery McGill University Health Center McGill University Montreal Quebec Canada
18. Department of Radiation Oncology McGill University Heath Center Montreal Quebec Canada
19. Department Otolaryngology‐Head and Neck Surgery Hôpital Maisonneuve‐Rosemont Université de Montreal Montreal Quebec Canada
20. Department of Head and Neck Surgery The University of Texas MD Anderson Cancer Center Houston Texas USA
21. Department of Otolaryngology‐Head and Neck Surgery McMaster University Hamilton Ontario Canada
22. Department of Pathology Jewish General Hospital McGill University Montreal Quebec Canada
23. Department of Radiation Oncology Jewish General Hospital McGill University Montreal Quebec Canada