1. Center for Child and Adolescent Medicine, Division of Child Neurology and Metabolic Medicine Heidelberg University Hospital Heidelberg Germany
2. Division of Pediatrics University Children's Hospital Greifswald Greifswald Germany
3. Division of Rheumatology, Department of Internal Medicine University of Leipzig Leipzig Germany
4. Hospital for Children and Adolescents, Centre for Pediatric Research Leipzig (CPL), Department of Women and Child Health University Hospital, University of Leipzig Leipzig Germany
5. Department of Gastroenterology, Hepatology and Infectiology University Hospital Düsseldorf Düsseldorf Germany
6. Pediatric Metabolic Medicine, Clinic for Pediatric Kidney, Liver‐ and Metabolic Diseases Hannover Medical School Hannover Germany
7. Dr. von Hauner Children's Hospital Munich Germany
8. Children's Hospital Reutlingen Reutlingen Germany
9. Department of Pediatrics University Medical Center Hamburg‐Eppendorf Hamburg Germany
10. Interdisciplinary Center for Metabolism Endocrinology, Diabetes and Metabolism and Center of Excellence for Rare Metabolic Diseases in Adults Charité‐Universitätsmedizin Berlin Germany
11. Neuropediatrics and Metabolism, Department of Pediatrics University Hospital Ulm Ulm Germany
12. Department of Pediatrics and Adolescent Medicine University Medical Centre Göttingen, Georg‐August‐University Göttingen Germany
13. Department of General Pediatrics University Children's Hospital Muenster Muenster Germany
14. Department of Pediatrics and Adolescent Medicine University Children's Hospital Freiburg, Faculty of Medicine Freiburg Germany
15. Practice for Internal Medicine Kaarst Germany