1. Children's Hospital Aschaffenburg‐Alzenau Aschaffenburg Germany
2. Department of Neurology and Pediatrics Vagelos College of Physicians and Surgeons at Columbia University New York NY USA
3. Department of Nutrition Hospital Pediatria JP Garrahan Buenos Aires Argentina
4. Department of Pediatric Neurology CHU Hôpital Robert DebreAPHP Paris France
5. Department of Neurology Comprehensive Epilepsy Center Johns Hopkins University School of Medicine Baltimore MD USA
6. UCL NIHR BRC Great Ormond Street Institute of Child Health London UK
7. Department of Child Neurology and Psychiatry IRCCS Mondino Foundation Pavia Italy
8. Department of Neuropediatrics, Developmental Neurology and Social Pediatrics, Centre for Neuromuscular Disorders in Children, University Hospital Essen University of Duisburg‐Essen Essen Germany
9. Department of Pediatric Neurology Paracelsus Medical Private University Nuremberg Germany
10. Departments of Neurology and Pediatrics Johns Hopkins University Baltimore MD USA
11. Department of Neurology Canisius Wilhemina Hospital Nijmegen The Netherlands
12. Center for Motor Neuron Biology & Disease Departments of Neurology and Pathology & Cell Biology Columbia University Irving Medical Center New York NY USA
13. Department of Pediatrics Tokyo Women's Medical University Tokyo Japan
14. Matthew's Friends Charity & Clinics Lingfield UK
15. Departments of Neurology and Neurotherapeutics, Physiology and Pediatrics Eugene McDermott Center for Human Growth and Development The University of Texas Southwestern Medical Center Dallas TX USA
16. Mount Sinai Center for Headache & Pain Medicine New York NY USA
17. First Department of Pediatrics Agia Sofia Hospital University of Athens Athens Greece
18. Florey and Murdoch Institutes Austin Health and Royal Children's Hospital The University of Melbourne Melbourne Victoria Australia
19. Pediatric Neurology V. Buzzi Hospital Child Neuropsychiatry University of Milan Milan Italy
20. Department of Pediatric Neurology Radboud University Medical Centre Amalia Children's Hospital Nijmegen Netherlands
21. Royal Hospital for Children & College of Medical Veterinary & Life Sciences University of Glasgow Glasgow UK