1. Institute of Epidemiology and Medical Biometry, ZIBMT; University of Ulm; Ulm Germany
2. German Center for Diabetes Research (DZD); Munich-Neuherberg Germany
3. Outpatient Diabetes Center; Essen Germany
4. AUF DER BULT; Diabetes Centre for Children and Adolescents; Hannover Germany
5. Outpatient Diabetes Center Munich South; Munich Germany
6. Department of Internal Medicine; Diabetes Center, Clinical Center Augsburg; Augsburg Germany
7. Diabetes Center Forchheim; Forchheim Germany
8. Department of Endocrinology, Diabetology and Clinical Nutrition; University Hospital Bern; Bern Switzerland
9. Outpatient Diabetes Center; Surheim Germany