1 Diabetes Centre Bad Mergentheim, Bad Mergentheim, Germany.
2 Diabetological Practice, Esslingen, Germany.
3 Department of Internal Medicine IV, University Hospital Tübingen, Tübingen, Germany.
4 Diabetes Centre am Marienplatz Munich, Munich, Germany.
5 Isar Hospital, Munich, Germany.
6 Birkenfeld, Germany.
7 Department of Internal Medicine I - General Internal Medicine, Endocrinology and Diabetology, Gastroenterology and Hepatology, Bergmannsheil University Hospitals, Bochum, Germany.
8 prima-diab Practice Drs. Uebel/Nittka/Mayer/Merkle, Ittlingen, Germany.