1. Department of Internal Medicine, Division of Dietetics Erasmus MC University Medical Center Rotterdam the Netherlands
2. Department of Pediatrics and Adolescent Medicine Medical University Vienna Vienna Austria
3. European Reference Network, EpiCARE
4. Paediatric Neurology Great North Children's Hospital Newcastle upon Tyne UK
5. Translational and Clinical Research Institute Newcastle University Newcastle upon Tyne UK
6. Department of Nutrition Hospital de Pediatria Prof. Dr. J.P. Garrahan Buenos Aires Argentina
7. Children's Mercy Hospital and Clinics Kansas City Missouri USA
8. UCL NIHR BRC Great Ormond Street Institute of Child Health Great Ormond Street Hospital for Children NHS Trust London UK
9. APHP, Service de Neurologie Pédiatrique Hôpital Robert Debré Paris France
10. Université Paris‐Cité INSERM Neuro Diderot Paris France
11. Institut Universitaire de France (IUF) Paris France