1. Department of Surgery Memorial Sloan Kettering Cancer Center New York New York USA
2. Department of Epidemiology and Biostatistics Memorial Sloan Kettering Cancer Center New York New York USA
3. Head and Neck Surgical Oncology Tata Memorial Hospital Mumbai India
4. Department of Otorhinolaryngology University of Insubria Varese Italy
5. Department of Head and Neck Surgery Beijing Tongren Hospital Beijing China
6. Unit of Otorhinolaryngology – Head and Neck Surgery University of Brescia, Spedali Civili BS Piazzale Spedali Civili Brescia Italy
7. Department of Head & Neck Oncology Princess Alexandra Hospital Woolloongabba Queensland Australia
8. Head and Neck Reference Center, AC Camargo Sao Paulo Brazil
9. Head and Neck Service, ICESP São Paulo Brazil
10. University of Nicosia Medical School Cyprus
11. Department of Otolaryngology – Head & Neck Surgery University Health Network Toronto Ontario Canada
12. ENT Department – Skull Base Center Hispital Lariboisiere APHP Paris France
13. Unit of Otorhinolaryngology – Maxillofacial, and Thyroid Surgery University of Milan Milan Italy
14. Oral and Maxillofacial Department 12 de Octubre University Hospital Madrid Spain
15. Department of Otolaryngology, Head and Neck Surgery, Faculty of Medicine Atılım University, Medicana International Ankara Ankara Turkey
16. Department of Head and Neck Surgery and Oncology Amrita Institute of Medical Sciences Kochi India
17. Sydney Ear Nose Throat Clinic Darlinghurst New South Wales Australia
18. Otolaryngology‐Head and Neck Surgery Amsterdam University Medical Center, VU University Amsterdam The Netherlands
19. Head and Neck Surgery Hospital Italiano de Buenos Aires Buenos Aires Argentina
20. Department of Otolaryngology – Head & Neck Surgery Kobe University Graduate School of Medicine Kobe Japan
21. ENT Department, Imperial College Healthcare NHS Trust Charing Cross Hospital London United Kingdom
22. Head and Neck Surgery Beijing Cancer Center Beijing China
23. Department of Otolaryngology – Head & Neck Surgery Medical University of South Carolina Charleston South Carolina USA
24. Department of Head and Neck Surgery Instituto Nacional de Câncer Rio de Janeiro Brazil
25. Department of Otolaryngology University of Miami Miami Florida USA
26. Department of Otolaryngology – Head and Neck Surgery University of Birmingham, University Hospitals Birmingham Birmingham United Kingdom
27. Department of Head and Neck Surgery The Greater Poland Cancer Centre Poznan Poland
28. Department of ENT Yonsei University Health System Seoul South Korea
29. Department of Head and Neck Surgery MD Anderson Cancer Center Houston Texas USA
30. Department of Neurosurgery MD Anderson Cancer Center Houston Texas USA