1. Head and Neck Unit, The Royal Marsden Hospital , London, UK
2. Department of Otolaryngology—H&N Surgery, Stanford University Medical Center , Palo Alto, CA, USA
3. Department of Speech, Voice and Swallowing, The Royal Marsden Hospital , London, UK
4. Department of Otolaryngology—H&N Surgery, Lausanne University Hospital , Lausanne, Switzerland
5. Department of Otolaryngology—H&N Surgery, Henry Ford Hospital , Detroit, MI, USA
6. Head and Neck Oncology Department, Institute Gustave Roussy , Paris, France
7. Department of Surgical Oncology and Robotic Surgery, BL Kapur Memorial Hospital , New Delhi, India
8. Department of Otolaryngology—H&N Surgery, University Health Network , Toronto, ON, Canada
9. Department of Otolaryngology, Eye & Ear Institute, University of Pittsburgh , Pittsburgh, PA, USA
10. Department of Otolaryngology—H&N Surgery, Florida Hospital Group , Celebration, FL, USA
11. Department of H&N Surgery, MD Anderson Cancer Center , Houston, TX, USA
12. Department of Otolaryngology—H&N Surgery, The Newcastle upon Tyne Hospitals , Newcastle, UK
13. Department of Head and Neck Surgery, Copenhagen University Hospital , Copenhagen, Denmark
14. Otorhinolaryngology—Head & Neck Surgery, University Hospitals Leuven, and Department of Oncology, Section Head and Neck Oncology, KU Leuven , Leuven, Belgium
15. Department of Otolaryngology Head and Neck Surgery, Northwell Health System , New York, NY, USA
16. Department of Otolaryngology—H&N Surgery, Mayo Clinic , Rochester, MN, USA
17. Department of H&N Surgery, Tata Memorial Hospital , Mumbai, India
18. Department of Otolaryngology, Mount Sinai Hospital , New York City, NY, USA
19. Department of Otolaryngology—H&N Surgery, Vanderbilt University Medical Center , Nashville, TN, USA
20. Clinical Trials Unit, The Royal Marsden Hospital , London, UK
21. Department of H&N Surgery, Tata Memorial Hospital, Homi Bhabha National Institute , Mumbai, India