1. Department of Respiratory Medicine and Sleep; Landspitali-The National University Hospital of Iceland; Reykjavik Iceland
2. Faculty of Medicine; University of Iceland; Reykjavik Iceland
3. Department of Pulmonary Medicine and Multidisciplinary Sleep Disorders Centre; Antwerp University Hospital and University of Antwerp; Antwerp Belgium
4. Centro de Medicina do Sono; Hospital Cuf Porto; Porto Portugal
5. Competence Center for Sleep Disorders; Haukeland University Hospital; Bergen Norway
6. Department of Neurology; Stavanger University Hospital; Stavanger Norway
7. Sleep Disorders Center; Sahlgrenska University Hospital; Gothenburg Sweden
8. Center for Sleep and Wakefulness Disorders; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
9. Sleep Unit; Neurophysiology Department; La Ribera University Hospital; Valencia Spain
10. Physiology Department; University of Valencia; Valencia Spain
11. Pulmonology Department; University of Medicine and Pharmacy ‘Victor Babes’; Sleep Medicine Laboratory; Cardioprevent Foundation; Timisoara Romania
12. Department of Respiratory and Sleep Medicine; University College Dublin; St Vincent's University Hospital; Dublin Ireland
13. On behalf of the European Sleep Research Society (ESRS); Regensburg Germany
14. Department of Neurosciences; Sleep Disorders Center; University of Parma; Parma Italy