1. Division of Paediatric Endocrinology & Diabetology, Centre of Child and Adolescent Medicine, Justus Liebig University, Giessen, Germany.
2. Department of Paediatrics, University Hospital Jena, Jena, Germany.
3. Institute of Epidemiology and Medical Biometry, University of Ulm, Ulm, Germany.
4. Department of Paediatrics, Medical University of Graz, Graz, Austria.
5. MEDIGREIF-Inselklinik Heringsdorf, Department of Diabetes and Metabolic Diseases, Ostseebad Heringsdorf, Germany.
6. German Clinic for Diagnostic, Children's and Adolescent's Outpatient Centre, Wiesbaden, Germany.
7. Paediatric Endocrinology and Diabetology, Ludwig Maximilians University of Munich, Munich, Germany.
8. St. Vincent Children's Hospital, Paderborn, Germany.