1. Department of Pediatric SurgeryNecker Enfants‐Malades Hospital‐Université Paris Descartes, Sorbonne Paris Cité Paris France
2. Department of Pediatric Surgery, Clinica Las Condes Medical CenterHospital de Niños Calvo Mackenna, University of Chile Santiago Chile
3. Tracheal TeamGreat Ormond Street Children's Hospital London United Kingdom
4. Pediatric Ear, Nose, and Throat DepartmentNecker Hospital for Sick Children, Public Assistance‐Hospitals of Paris Paris France
5. Pediatric Surgery DepartmentHospital Vall d'Hebron Barcelona Spain
6. DINOGMI University of Genoa Genoa Italy
7. Pediatric Surgery, Department of Women's and Children's HealthUniversity of Padua Padua Italy
8. Department of Otorhinolaryngology, Head and Neck SurgeryUniversity of Campinas Campinas, São Paulo Brazil
9. Chair of Pediatric Surgery of N.I. Pirogov Russian Research Medical UniversityDmitry Rogachev Federal Research Center of Pediatric Hematology, Oncology and Immunology; ZAO European Medical Center Moscow Russia
10. Division of Pediatric Otolaryngology‐Head and Neck SurgeryCincinnati Children's Hospital Medical Center Cincinnati Ohio U.S.A
11. Department of General SurgeryHospital de Pediatría “Prof. Dr. Juan P. Garrahan” Pichincha 1850 Ciudad De Buenos Aires
12. Department of Thoracic Surgery and EndoscopyHospital Infantil de México Federico Gómez Mexico
13. Department of Surgery, Fundación HospitalariaPrivate Children's Hospital, Ciudad Autónoma de Buenos Aires Buenos Aires Argentina
14. Department of SurgeryHôpital Trousseau‐Hôpitaux Universitaires de l'Est Parisien (AP‐HP), Université Pierre et Marie Curie Paris France
15. Epidemiology, and Biostatistics Unit Genoa Italy
16. Pediatric Oncology UnitFondazione IRCCS Istituto Nazionale Tumori Milan Italy
17. Pediatric Hematology and Oncology DivisionUniversity of Padua Padua Italy
18. Airway Unit, IRCCS Istituto Giannina Gaslini Genoa Italy