1. Paediatric and Adolescent Medicine, Oslo University Hospital , 0424 Oslo , Norway
2. European Reference Network for Hereditary Metabolic Diseases (MetabERN)
3. Neurometabolic Unit and Synaptic Metabolism Laboratory, Department of Neurology, Sant Joan de Déu Hospital, IPR , Barcelona 08950 , Spain
4. Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III , Madrid 28029 , Spain
5. Department of Medical Biochemistry, Oslo University Hospital-Rikshospitalet , PO Box 4950 Nydalen, OUS HF Rikshospitalet, 0424 Oslo , Norway
6. Department of Microbiology, Clinic for Diagnostics and Intervention, Oslo University Hospital, Rikshospitalet , Nydalen, N-0424 Oslo , Norway
7. Department of Pediatric Gastroenterology, Nephrology and Metabolic Medicine, Charité—Universitätsmedizin Berlin , Berlin 13353 , Germany
8. Center for Chronically Sick Children, Charité—Universitätsmedizin Berlin , Berlin 13353 , Germany
9. Biochemical Genetics Laboratory, Human Genetics, CHU of Liege, University of Liège , Liège 4000 , Belgium
10. Department of Human Genetics, CHU of Liege, University of Liège , Liège 4000 , Belgium
11. Department of Pediatric Metabolic Diseases, Marmara University School of Medicine , Istanbul 34854 , Turkey
12. Department of Medical Genetics, University of Harran , 63000 Sanliurfa , Turkey
13. Department of Pediatric Metabolism, Ankara University School of Medicine , 06100 Ankara , Turkey
14. Department of Metabolic Medicine, Great Ormond Street Hospital for Children , London WC1N 3JH , UK
15. NIHR Great Ormond Street Hospital Biomedical Research Centre (NIHR GOSH BRC) , London WC1N 3JH , UK
16. Department of Pediatrics and Psychiatry, The Mount Sinai Hospital , New York, NY 1468 , USA
17. Department of Neurology, Clinical Hospital of the Faculty of Medicine, University of São Paulo , São Paulo 05403-010 , Brazil
18. Neuropediatric Department, Hospital Universitario Clínico San Cecilio , Granada 18016 , Spain
19. Centro de Diagnóstico de Enfermedades Moleculares, Centro de Biología Molecular Severo Ochoa, CBM-CSIC, Departamento de Biología Molecular, Institute for Molecular Biology-IUBM, Universidad Autónoma Madrid, CIBERER, IDIPAZ , 28049 Madrid , Spain
20. Pediatric Services Division, Johns Hopkins Aramco Healthcare , Dhahran 34465 , Saudi Arabia
21. Neurometabolic Unit, Department of Gastroenterology and Nutrition, Sant Joan de Déu Hospital , Barcelona 08950 , Spain
22. Institut de Recerca Sant Joan de Déu, Pediatric Radiology Department Esplugues de Llobregat, Hospital Sant Joan de Déu , 08950 Barcelona , Spain
23. Department of Radiology, Baskent University School of Medicine , Ankara 06790 , Turkey
24. Department of Pediatric Metabolic Diseases, University of Harran , Sanliurfa 63000 , Turkey
25. Dr. John T. Macdonald Foundation Department of Human Genetics and John P.Hussman Institute for Human Genomics, University of Miami Miller School of Medicine , Miami, FL 33136 , USA
26. Section of Inborn Errors of Metabolism-IBC, Department of Biochemistry and Molecular Genetics, Hospital Clínic , Barcelona 08036 , Spain
27. Department of Clinical Biochemistry, Sant Joan de Déu Hospital , Barcelona 08950 , Spain
28. Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital , Oslo 0424 , Norway
29. Biochemical Genetics Laboratory, Department of Laboratory Medicine and Pathology, Mayo Clinic , Rochester, NY 55905 , USA
30. Dietetics, Great Ormond Street Hospital for Children, NHS Foundation Trust , London WC1N, 3JH , UK
31. Institute of Clinical Medicine, University of Oslo , Nydalen, Oslo 0424 , Norway