1. Centro Studi SM, H S. Antonio Abate, Gallarate, VA, Italy
2. Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
3. Russian State Medical University, Department of Neurology and Neurosurgery, Moscow, Russia
4. University of Florence, Department of Neurological and Psychiatric Sciences, Florence, Italy
5. Hacettepe University, Hospital, Department of Pediatric Neurology, Ankara, Turkey
6. Copenhagen University Hospital, The Neuroscience Centre, Rigshospitalet, Copenhagen, Denmark
7. University Medical Centre, Groningen, Department of Pediatric Neurology, Groningen, The Netherlands
8. University San Raffaele, Neuroimaging Research Unit, Milan, Italy
9. The Children's Memorial Health Institute, Departments of Neurology and Epileptology, Warsaw, Poland
10. Erasmus MC, Department of Neurology, Rotterdam, The Netherlands
11. University of Vienna Medical School, Department of Neuropsychiatry of Childhood and Adolescence, Vienna, Austria
12. Evelina's Children's Hospital at Guys and St.Thomas' Hospitals, Department of Pediatric Neurology, London, UK
13. Karolinska Institute, Department of Neurology, Stockholm, Sweden
14. Institute of Neurology, Novi Sad, Republic of Serbia
15. Medical University Innsbruck, Division of Pediatric Neurology and Inherited Metabolic Disorders, Innsbruck, Austria
16. Bicêtre Hospital, Department of Neuropediatrics, University Paris Sud, France
17. Birmingham Children's Hospital, Department of Neurology, Birmingham, UK
18. Erasmus MC, Department of Neurology, Rotterdam, The Netherlands,