1. IRCCS Istituto delle Scienze Neurologiche di Bologna Bologna Italy
2. University of Modena and Reggio Emilia Modena Italy
3. Department of Biomedical and Neuromotor Sciences (DIBINEM) University of Bologna Bologna Italy
4. Pediatric Sleep Disorders Center, AP‐HP, Robert Debre Hospital Paris France
5. National Reference Centre for Orphan Diseases, Narcolepsy, Idiopathic Hypersomnia and Kleine‐Levin Syndrome Paris France
6. Children's Sleep Medicine Kings College London UK
7. National Reference Centre for Orphan Diseases, Narcolepsy, Idiopathic Hypersomnia, and Kleine‐Levin Syndrome, Gui‐de‐Chauliac Hospital, CHU Montpellier Montpellier France
8. Institute of Neurosciences of Montpellier, University of Montpellier, INSERM Montpellier France
9. Department of Developmental and Social Psychology Sapienza University Rome Italy
10. Pediatric Sleep Unit and National Reference Center for Narcolepsy, Mother‐Children's Hospital, Hospices Civils de Lyon & U1028, Lyon Neuroscience Research Center (CRNL), University Lyon 1 Lyon France
11. National Reference Centre for Orphan Diseases, Narcolepsy, Idiopathic Hypersomnia, and Kleine‐Levin Syndrome Lyon Lyon France
12. Neurology Service, Sleep Disorders Centre, Hospital Clínic Barcelona, Universitat de Barcelona. IDIBAPS, CIBERNED: CB06/05/0018‐ISCIII Barcelona Spain
13. Danish Center for Sleep Medicine, Department of Clinical Neurophysiology Copenhagen Denmark
14. Center for Sleep Medicine, Sleep Research and Epileptology, Clinic Barmelweid AG Barmelweid Switzerland
15. Department of Neurology, Inselspital Bern University Hospital and University of Bern Bern Switzerland
16. Norwegian Center for Neurodevelopmental Disorders and Hypersomnias – NevSom, Department of Rare Disorders Oslo University Hospital Oslo Norway
17. Institute of Clinical Medicine, University of Oslo Oslo Norway
18. Neurocenter of Southern Switzerland, Faculty of Biomedical Sciences Università della Svizzera Italiana, Sleep Medicine Unit, Civic Hospital Lugano Switzerland
19. Child Neuropsychiatry Unit IRCCS Istituto G. Gaslini Genoa Italy
20. Department of Neuroscience – Rehabilitation – Ophthalmology – Genetics – Child and Maternal Health (DINOGMI) University of Genova Genoa Italy
21. Department of Neurosciences, Clinicum University of Helsinki Helsinki Finland
22. Helsinki Sleep Clinic, Terveystalo Healthcare Helsinki Finland
23. Department of Neurology The James Cook University Hospital Middlesbrough UK
24. Department of Neurology and Center for Clinical Neuroscience, First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
25. Department of Pediatrics Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
26. Department of Pediatrics Halmstad County Hospital Halmstad Sweden
27. Associazione Italiana Narcolettici e Ipersonni Florence Italy
28. European Narcolepsy Alliance for Patients Bruxells Belgium
29. Center for Narcolepsy and Hypersomnias, Professorship for Narcolepsy and Hypersomnolence Research, Department of Medicine University Witten/Herdecke Witten Germany
30. Center for Biomedical Education and Research (ZBAF) University Witten/Herdecke Witten Germany
31. Stichting Epilepsie Instellingen Nederland (SEIN), Sleep–Wake Center Heemstede Netherlands
32. Department of Neurology Leiden University Medical Centre Leiden Netherlands
33. Medical Faculty University of Bern Bern Switzerland
34. Department of Neurology University Hospital (Inselspital) Bern Switzerland