1. aMedical Faculty of Heidelberg, Center for Child and Adolescent Medicine, Division of Child Neurology and Metabolic Medicine, Heidelberg University, Heidelberg, Germany
2. bDepartment of General Pediatrics, Neonatology, and Pediatric Cardiology, University Children’s Hospital
3. cClinic for Gastroenterology, Hepatology and Infectious Diseases, University Hospital Düsseldorf, Medical Faculty of Heinrich Heine University Düsseldorf, Düsseldorf, Germany
4. dDivision of Pediatric Neurology, University Children’s Hospital Frankfurt, Frankfurt, Germany
5. eDepartment of Pediatrics, University Hospital Muenster, Muenster, Germany
6. fChildren’s Hospital Reutlingen, Klinikum am Steinenberg, Reutlingen, Germany
7. gDepartment of Pediatric and Adolescent Medicine, University of Ulm, Ulm, Germany
8. hCorporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Pediatric Gastroenterology, Nephrology and Metabolic Diseases, Center of Chronically Sick Children, Charité - Universitätsmedizin Berlin, Berlin, Germany
9. iDepartment of Women and Child Health, Hospital for Children and Adolescents, Center for Pediatric Research Leipzig (CPL), University Hospitals, University of Leipzig, Leipzig, Germany
10. jChildren’s Hospital Carl Gustav Carus, Technical University Dresden, Dresden, Germany
11. kDepartment of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
12. lVilla Metabolica, Center for Pediatric and Adolescent Medicine, Mainz University Medical Center, Mainz, Germany
13. mCenter of Child and Adolescent Medicine, Justus Liebig University, Giessen, Germany
14. nDepartment of Child Neurology, Children’s Hospital Oldenburg, Oldenburg, Germany
15. oDepartment of Pediatrics, University Medical Center Eppendorf, Hamburg, Germany
16. pClinic for Internal Medicine III, Endocrinology and Metabolic Diseases, University Hospital Jena