1. Department of General Pediatrics, Neonatology and Pediatric Cardiology, University Children's Hospital, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
2. Institute of Epidemiology and Medical Biometry, ZIBMT, University of Ulm, Ulm, Germany
3. Department of Paediatrics, Medical University of Graz, Austria
4. Division of Endocrinology and Diabetology, Department of Internal Medicine II, University Hospital of Freiburg, Freiburg, Germany
5. Department of Internal Medicine 1, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
6. Centres of Endocrinology and Metabolism, Bamberg and Erlangen, Germany
7. Specialized Diabetes Practice Diabetologikum, Ludwigshafen, Germany
8. Specialized Diabetes Practice, Rosenheim, Germany
9. Department of Pediatrics, Saarland University, Homburg, Germany
10. Clinic for Gastroenterology and Gastrointestinal Oncology, Endocrine Unit, University Medical Center Göttingen, Göttingen, Germany
11. Hospital for Children and Adolescents, Sana Hospital Berlin Lichtenberg, Berlin, Germany
12. Diabetes Center for Children and Adolescents, Children's Hospital Auf der Bult, Hannover, Germany