1 Department of General Pediatrics, Division of Neuropediatrics and Inherited Metabolic Diseases, University Children's Hospital, Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany.
2 Assistance Publique-Hôpitaux de Paris, Centre de Référence de Maladies Métaboliques (MaMEA), Hôpital Universitaire Necker-Enfants Malades and Insitut MAGINE, Paris, France.
3 Centre for Inherited Metabolic Diseases, Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
4 Department of Pediatrics, Academic Medical Center, Amsterdam, Netherlands.
5 Klinikum am Steinenberg, Klinik für Kinder- und Jugendmedizin, Reutlingen, Germany.
6 School of Medicine, University Hospital Center Zagreb and University of Zagreb, Zagreb, Croatia.
7 Division of Metabolism and Children's Research Centre, University Children's Hospital Zurich, Steinwiesstraße 75, CH-8032, Zurich, Switzerland.
9 Children's National Medical Center, 111 Michigan Avenue, N.W., Washington, DC, 20010, USA.
10 Hospital San Joan de Deu, Servicio de Neurologia and CIBERER, ISCIII, Barcelona, Spain.
11 Clinic for Pediatrics I, Inherited Metabolic Disorders, Medical University of Innsbruck, Innsbruck, Austria.
12 Klinik für Kinder- und Jugendmedizin, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany.
13 Birmingham Children's Hospital NHS Foundation Trust, Birmingham, UK.
14 Reference Center for Inborn Errors of Metabolism, APHP, University Paris-Diderot and INSERM U1141, Robert-Debré Hospital, Paris, France.
15 Screening Department, Institute of Mother and Child, Warsaw, Poland.
16 Willink Biochemical Genetics Unit, Genetic Medicine, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK.
17 First Faculty of Medicine, Charles University and General University of Prague, Prague, Czech Republic.
18 Centre de Référence des Maladies Héréditaires du Métabolisme, Service de Neurologie, Hôpital d'Enfants, CHU Timone, Marseilles, France.
19 Department of General Pediatrics, Division of Neuropediatrics and Inherited Metabolic Diseases, University Children's Hospital, Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany. Stefan.Koelker@med.uni-heidelberg.de.