1. Department of Child Neurology, Justus-Liebig University Gießen, Germany
2. Children's hospital, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
3. Department of Neuropediatrics and Muscle Disorders, Medical Center-University of Freiburg, Freiburg, Germany
4. Department of Pediatrics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
5. Hannover Medical School, Clinic for Pediatric Kidney, Liver and Metabolic Diseases, Hannover, Germany
6. Villa Metabolica, Department of Pediatric and Adolescent Medicine, University Medical Center Mainz, Mainz, Germany
7. Department of Pediatrics and Adolescent Medicine, Division of Pediatric Neurology, University Medical Center Göttingen, Georg August University, Göttingen, Germany
8. Centre for Inborn Metabolic Disorders, Department of Neuropediatrics, Jena University Hospital, Jena, Germany