1. Department of Clinical Biochemistry Institut de Recerca Sant Joan de Déu Barcelona Spain
2. Universitat de Barcelona Barcelona Spain
3. Pediatric Neurology Research Group Hospital Vall d'Hebrón Barcelona Spain
4. Universitat Autònoma de Barcelona Barcelona Spain
5. Department of Paediatrics Hospital General de Granollers Granollers Spain
6. Department of Paediatric Neurology Hospital Agia Sofia Athens Greece
7. Institute of Child Health Agia Sofia Children's Hospital Athens Greece
8. Unit of Paediatric Neurology, Department of Pediatrics University Hospital Reina Sofía Córdoba Spain
9. Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC) Córdoba Spain
10. CIBERER‐ISCIII, Centro de Investigaciones Biomédicas en Red de Enfermedades Raras Madrid Spain
11. Division of Metabolism Bambino Gesù Children's Hospital Rome Italy
12. Department of Pediatric Neurology Hospital Infantil Universitario Niño Jesús Madrid Spain
13. Department of Paediatric Neurology Hospital Sant Joan de Déu, University of Barcelona Barcelona Spain
14. Department of Neuroradiology Hospital Vall d'Hebron – Institut de Recerca (VHIR) Barcelona Spain
15. Unit of Paediatric Neurology, Department of Pediatrics Complejo Hospitalario de Navarra, Navarrabiomed Pamplona Spain
16. Secció d'Errors Congènits del Metabolisme ‐IBC, Servei de Bioquímica i Genètica Molecular Hospital Clínic, IDIBAPS, CIBERER Barcelona Spain
17. Department of Neurology and Psychiatry Sapienza University of Rome Rome Italy
18. Department of Experimental Medicine Sapienza University Rome Italy
19. Unit of Paediatric Neurology Hospital Universitario Lucus Augusti Lugo Spain
20. Department of Pediatric Metabolism University Cruces Hospital Barakaldo Spain
21. Pediatric Neurology AZ Delta Roeselare Belgium