1. Institute of Epidemiology and Medical Biometry, ZIBMT; University of Ulm; Ulm Germany
2. German Center for Diabetes Research (DZD); Munich-Neuherberg Germany
3. Specialized Practice for Diabetes and Nutritional Medicine; Munich Germany
4. Diabetescenter, Klinikum Dortmund GmbH; Dortmund Germany
5. Clinic of Internal Medicine, Alexianer St. Hedwig Hospital; Berlin Germany
6. Diabetes Center, Clinic Tettnang; Tettnang Germany
7. Specialized Diabetes Practice; Saaldorf-Surheim Germany
8. Alb Fils Kliniken, Helfenstein Clinic; Geislingen Germany
9. Diabetes-Practice Dr. Best; Essen Germany
10. 5 Medical Department, Wilhelminenspital; Vienna Austria