1. Department of Chest Diseases Ege University Faculty of Medicine Izmir Turkey
2. Sleep Disorders Center Center for Sleep and Wake Disorders Sahlgrenska University Hospital Sahlgrenska Academy Gothenburg University Gothenburg Sweden
3. Sleep Laboratory ENT Department Førde Central Hospital Førde Norway
4. Multidisciplinary Sleep Disorders Centre Antwerp University Hospital and University of Antwerp Antwerp Belgium
5. Department of Respiratory Medicine School of Medicine St Vincent's Hospital Group University College Dublin Dublin Ireland
6. Sleep Disorders Centre Hospital Antoine‐Beclere Clamart France
7. Department of Respiratory Medicine and Tuberculosis Faculty of Medicine P.J. Safarik University Kosice Slovakia
8. PROMISE Dept University of Palermo Palermo Italy
9. Division of Medicine Department of Pulmonary Diseases Department of Pulmonary Diseases and Clinical Allergology Turku University Hospital and Sleep Research Centre University of Turku Turku Finland
10. Sleep Unit Department of Pneumonology Democritus University of Thrace Alexandroupolis Greece
11. National Research Council Istituto per la Ricerca e l'Innovazione Biomedica Palermo Italy