1. Department of Otolaryngology–Head and Neck Surgery Western University London ON Canada
2. Department of Paediatric Otolaryngology Birmingham Children's Hospital Birmingham UK
3. Department of Otorhinolaryngology Hospital Italiano de Buenos Aires Buenos Aires Argentina
4. Department of Otolaryngology–Head and Neck Surgery John Hunter Adult and Children's’ Hospitals Newcastle NSW Australia
5. Department of Otolaryngology–Head and Neck Surgery Children's Hospital Westmead and Westmead Hospital Sydney NSW Australia
6. Department of Otorhinolaryngology, Saint‐Luc University Hospital University of Louvain Brussels Belgium
7. Department of Otorhinolaryngology State University of Campinas (UNICAMP) Campinas Brazil
8. Department of Otorhinolaryngology–Head and Neck Surgery Carl‐Thiem‐Klinikum Cottbus Germany
9. Department of Otorhinolaryngology ‐ Head and Neck Surgery Madras ENT Research Foundation Chennai India
10. Airway Surgery Unit, Pediatric Surgery Department, Bambino Gesù Children's Hospital Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Rome Italy
11. Association “Naso Sano” Onlus, Umbria Regional Registry of Volunteer Activities, Department of Otorhinolaryngology and Head and Neck Surgery Gubbio‐Gualdo Tadino Hospital Perugia Italy
12. Department of Otolaryngology–Head and Neck Surgery Hotel Dieu de France Hospital Saint Joseph University Beirut Lebanon
13. Department of Otolaryngology Pontificia Universidad Católica de Chile Santiago Chile
14. Norwegian Society of Otorhinolaryngology–Head and Neck Surgery Nesttun Norway
15. University Medical Center Utrecht Utrecht Netherlands
16. Department of Otolaryngology Hospital Medica Sur Mexico Mexico
17. Department of Otorhinolaryngology Coimbra Hospital and University Centre Coimbra Portugal
18. Department of Otolaryngology Lund University Lund Sweden
19. Division of Otorhinolaryngology University of Cape Town Cape Town South Africa
20. ENT Morningside Morningside Mediclinic Sandton Johannesburg South Africa
21. Department of Otolaryngology–Head and Neck Surgery Hôpitaux Universitaires de Marseille Conception, Assistance Publique‐Hôpitaux de Marseille (APHM), Aix‐Marseille University Marseille France
22. Department of Otorhinolaryngology–Head and Neck Surgery Hospital Universitario de Donostia San Sebastian Spain
23. Department of Otolaryngology–Head and Neck Surgery Istanbul Training and Research Hospital Istanbul Turkey
24. Department of Otolaryngology Saint Petersburg Research Institute of Ear, Throat, Nose and Speech First Pavlov State Medical University Saint Petersburg Russia
25. Department of Otorhinolaryngology–Head and Neck Surgery University of Pennsylvania Philadelphia PA
26. Department of Otolaryngology University of Miami Miami FL
27. Department of Otolaryngology–Head and Neck Surgery Stanford University School of Medicine Palo Alto CA