1. Head and Neck Department; ENT & Oral Surgery Unit; Morgagni-Pierantoni Hospital; Forlì Italy
2. ENT Unit; Santa Maria delle Croci Hospital; Ravenna AUSL of Romagna; Romagna Italy
3. ENT Clinic; Hospital Universitario Doctor Peset; Valencia Spain
4. Department of Otorhinolaryngology and Head and Neck Surgery; OLVG; Amsterdam The Netherlands
5. Medisch Centrum Jan van Goyen; Amsterdam The Netherlands
6. Royal National Throat Nose & Ear Hospital; UCLH; London UK
7. Department of Otolaryngology, OLVG Hospital and ACTA; Amsterdam Netherlands
8. Department of Otorhinolaryngology and Head and Neck Surgery; Multidisciplinary Sleep Disorders Center; University of Antwerp; Antwerp Belgium
9. Department of Oral Kinesiology; Academic Centre for Dentistry; MOVE Inst.; Amsterdam The Netherlands
10. Department of Otorhinolaryngology, Head and Neck Surgery; Jan Palfijn Hospital; Ziekenhuis Netwerk Antwerpen (ZNA); Antwerpen Belgium
11. Sleep Disorders Centre; Department of Otorhinolaryngology, Head and Neck Surgery; University Medicine Mannheim; Mannheim Germany
12. Pulmonary Operative Unit; Department of Thoracic Diseases; Morgagni-Pierantoni Hospital; AUSL of Romagna; Forlì Italy
13. Service ORL; Hopital Foch, Suresnes France and Centre Medical Veille Sommeil; Paris France
14. Department of Otorhinolaryngology, Head and Neck Surgery; Technische Universitat Munchen; Munich Germany
15. Department of Otorhinolaryngology, Head and Neck Surgery; Carl Thiem Klinikum; Cottbus Germany
16. Head and Neck Department; ENT & Oral Surgery Unit; Morgagni-Pierantoni Hospital; AUSL of Romagna; Forlì Italy
17. Intensive Care Unit; Morgagni-Pierantoni Hospital; AUSL of Romagna; Forlì Italy
18. Sleep Lab. Pulmonary Rehabilitation Dept. Istituti Clinici Scientifici Maugeri; SPA SB; IRCCS; Veruno Italy
19. Department of Otorhinolaryngology, Head and Neck Surgery; Antwerp University Hospital; Edegem Belgium
20. ENT, Head and Neck Surgery; Alfried Krupp Hospital; Essen Germany
21. Department of Otolaryngology, Head and Neck Surgery; Sant'Orsola-Malpighi University Hospital; Bologna Italy
22. Faculty of Medicine and Health Sciences; University of Antwerp- Department ENT, Head and Neck Surgery; Antwerp University Hospital - Multidisciplinary Sleep Disorders Centre; Antwerp University Hospital; Antwerp Belgium
23. Head and Neck Department; AUSL of Romagna; ENT & Oral Surgery Unit; Morgagni-Pierantoni Hospital; Forlì Italy
24. ENT Unit; Infermi Hospital; AUSL of Romagna; Faenza Italy
25. ENT Unit; Santa Maria delle Croci Hospital; Ravenna Italy
26. AUSL of Romagna; Romagna Italy
27. ENT Clinic; University of Ferrara; Ferrara Italy