1. Department of Human Neuroscience, Sapienza University, Rome 00185, Italy
2. Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520, USA
3. Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, USA
4. Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome 00161, Italy
5. Department of Pediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague 12808, Czech Republic
6. Section for Pediatrics, Department of Clinical Sciences, Lund University, Lund 22184, Sweden
7. Department of Experimental Medicine, Sapienza University, Rome 00161, Italy
8. Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen 9700, the Netherlands
9. Department of Pediatrics, McGill University, Montreal, QC H4A 3J1, Canada
10. Department of Neurology and Neurosurgery, McGill University, Montreal, QC H4A 3J1, Canada
11. Department of Genetics, University Medical Center Utrecht, Utrecht 3584 CX, the Netherlands
12. Department of Neurology, University of Pennsylvania, Philadelphia, PA 19104, USA
13. Division of Medical Genetics, Nemours/A I duPont Hospital for Children, Wilmington, DE 19803, USA
14. Division of Genetic Medicine, Lausanne University Hospital and University of Lausanne, Lausanne 1011, Switzerland
15. Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf 40225, Germany
16. Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
17. Department of Clinical Sciences and Translational Medicine, University of Rome ‘Tor Vergata’, Rome 00133, Italy
18. Division of Neuropsychiatry, Epilepsy Center for Children, Martini Hospital, Turin 10128, Italy
19. Department of Medical Sciences, University of Torino & Medical Genetics Unit, Città della Salute e della Scienza University Hospital, Turin 10126, Italy
20. Children's Hospital Colorado, Aurora, CO 80045, USA
21. Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA
22. Hopital Universitaire Necker Enfants Malades APHP, Paris 75015, France
23. South West Thames Regional Genetics Service, St. George's Healthcare NHS Trust, London SW17 0QT, UK
24. Montréal Neurological Institute and Hospital, McGill University, Montreal, QC H3A 2B4, Canada
25. Department of Human Genetics, McGill University, Montréal, QC H3A 0C7, Canada
26. Department of Human Genetics, Radboud University Medical Centre, Nijmegen 6525, the Netherlands
27. Undiagnosed Diseases Program, National Institutes of Health, Bethesda, MD 20892-2152, USA
28. Department of Clinical Genetics, Radboud University Medical Centre, Nijmegen 6525, the Netherlands
29. Service d’Epileptologie et Médecine du handicap, Hôpital Neurologique, Institution de Lavigny, Lavigny 1175, Switzerland
30. East Tennessee Children's Hospital, University of Tennessee Department of Medicine, Knoxville, TN 37916, USA
31. Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome 00146, Italy
32. Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
33. Division of Neurology, Children's Hospital of Eastern Ontario, Ottawa ON K1H 8L1, Canada
34. Arnold Palmer Hospital for Children, Orlando, FL 32806, USA
35. Department of Pediatric Neurology, IRCCS Foundation Carlo Besta Neurological Institute, Milan 20133, Italy
36. AOU Meyer, Pediatric Neurology, Neurogenetics and Neurobiology Unit and Laboratories, Meyer Children's Hospital, University of Florence, Florence 50139, Italy
37. Department of Neurology, Translational Metabolic Laboratory, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Centre, Nijmegen 6525 AJ, the Netherlands
38. Division of Medical Genetics, Department of Pediatrics, CHU Sainte-Justine and University of Montreal, Montreal, QC H3T1C5, Canada