1. University Children’s Hospital Zürich, Zurich, Switzerland;
2. Pediatrics, Children’s Hospital Regensburg, University of Regensburg, Regensburg, Germany;
3. University of Groningen, University Medical Center Groningen, Beatrix Children’s Hospital, Groningen, Netherlands;
4. Hospital Sant Joan de Déu, Barcelona, Spain;
5. Division of Inherited Metabolic Diseases, Department of Pediatrics, University Hospital Padova, Padova, Italy;
6. U Enfermedades Metabólicas, Hospital Ramón y Cajal, Madrid, Spain;
7. Unit of Diagnosis and Treatment of Congenital Metabolic Diseases, Department of Pediatrics, Hospital Clinico Universitario de Santiago de Compostela, Santiago de Compostela, Spain;
8. Reference Center for Inborn Errors of Metabolism, Vandoeuvre les Nancy, France;
9. Il Clinica Pediatrica “G. Gaslini,” Dipartimento di Pediatria Errori congeniti del Metabolismo, Universitá degli Studi di Genova, Genoa, Italy;
10. Department of Inborn Errors of Metabolism and Molecular Pediatrics, Dr von Hauner Children’s Hospital, Munich, Germany;
11. Department of Pediatrics, Emma Children’s Hospital, and Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands;
12. University Hospital, Catania, Italy;
13. Service de neuropédiatrie, Pathologie du développement, Hôpital Trousseau, and Université Pierre et Marie Curie, Paris, France;
14. Pediatric Nephrology and Metabolism, Children’s Hospital, University of Geneva, Geneva, Switzerland;
15. Ospedale San Paolo, Milan, Italy;
16. Department of Pediatrics, Teaching Hospital of Rennes, Rennes, France;
17. Department of Pediatrics, Sapienza Università, Rome, Italy;
18. University Children’s Hospital Heidelberg, Heidelberg, Germany; and
19. Research Center for Child, Zurich, Switzerland