1. Faculty of Medicine, Institute of Epidemiology and Medical Biometry; University of Ulm; Ulm 89081 Germany
2. Division of Endocrinology and Diabetes; University Medical Centre; Ulm 89070 Germany
3. Institute of Diabetes Research; Helmholtz Zentrum München; 85764 Neuherberg Germany
4. Department of Pediatrics; Medical University; Düsseldorf 40225 Germany
5. Pediatric Diabetology; Clinic of Pediatrics, Charité; Berlin 13353 Germany
6. Vestische Children's Clinic; Witten/Herdecke University; Datteln 45711 Germany
7. Hospital for Children and Adolescents; University of Leipzig; Leipzig 04103 Germany
8. Division of Endocrinology and Diabetes; RWTH Aachen University; Aachen 52074 Germany
9. Institute for Transfusions Medicine, University Medical Center Hamburg-Eppendorf; Hamburg 20251 Germany
10. Department of Pediatrics; Medical University of Vienna; Vienna 1090 Austria