1. Department of Pediatric Endocrinology, Diabetes and Nutrition Medicine, Vestische Hospital for Children and Adolescents Datteln; University of Witten/Herdecke; Datteln Germany
2. Pediatric Endocrinology Division, Children's Hospital; University of Bonn; Bonn Germany
3. Department of Pediatric Endocrinology and Diabetes; Charité Childrens' Hospital Universitätsmedizin Berlin; Berlin Germany
4. Division of Endocrinology and Diabetes, Medical Faculty, German Center for Diabetes Research (DZD); RWTH Aachen University; Aachen Germany
5. Department of General Pediatrics, Neonatology and Pediatric Cardiology; University Children's Hospital Düsseldorf; Duesseldorf Germany
6. Department for Pediatrics and Adolescent Medicine; Medical University of Vienna; Vienna Austria
7. Institute of Epidemiology and Medical Biometry, ZIBMT, German Center for Diabetes Research (DZD); University of Ulm; Ulm Germany