1. Department of Psychiatry and Psychotherapy; Medical Center - University of Freiburg; Faculty of Medicine; University of Freiburg; Freiburg Germany
2. University Hospital for Neurology; Inselspital Bern; Bern Switzerland
3. Department of Global Public Health and Primary Care; University of Bergen; Bergen Norway
4. Institute of Clinical Neurophysiology; University Medical Center Ljubljana; Ljubljana Slovenia
5. Northumbria Sleep Research Laboratory; Northumbria University; Newcastle UK
6. Sleep and Circadian Neuroscience Institute; Nuffield Department of Clinical Neuroscience at the University of Oxford; Oxford UK
7. Sleep Research Institute Madrid; Madrid Spain
8. Stavanger University Hospital; Stavanger Norway
9. Centro de Medicina de Sono; Hospital Cuf; Porto Portugal
10. Department of Clinical Neuroscience; Karolinska Institute; Stockholm Sweden
11. Department of Clinical Medicine; University of Copenhagen; Copenhagen Denmark
12. Centre du Sommeil et de la Vigilance et EA 7330 VIFASOM; Université Paris Descartes; Clinic Hotel-Dieu; Sorbonne Paris Cité; APHP; HUPC; Hotel Dieu de Paris; Paris France
13. University Hospital of Psychiatry; Bern Switzerland
14. Department of Medicine and Surgery; University of Parma; Parma Italy
15. National Institute for Health and Welfare Helsinki; Helsinki Finland
16. Sleep Medicine Centre; Kempenhaeghe Foundation; Heeze The Netherlands
17. Multidisciplinary Sleep Disorders Centre; Antwerp University Hospital and University of Antwerp; Edegem-Wilrijk Belgium
18. Sleep Center Pfalzklinikum; Klingenmünster Germany
19. Sleep Medicine Center and Third Department of Psychiatry; Institute of Psychiatry and Neurology; Warsaw Poland
20. Burnasyan Federal Medical Biophysical Center of the Federal Medical Biological Agency; Moscow Russia
21. Sleep Measurements; National University Hospital of Iceland; Reykjavik Iceland
22. Institute for Pneumology; Medical Faculty; University of Bucharest; Bucharest Romania
23. Centre for Sleep Disorders in Children and Adolescents; General Hospital Celje; Ljubljana Slovenia
24. Department of Neurology; Bispebjerg and Frederiksberg Hospital; Copenhagen Denmark