1. Diabetes Mellitus Department, Tzanio General Hospital, Athens, Greece
2. Internal Medicine Department, Kimi General Hospital, Kimi, Greece
3. Cardiology Department, Onassis Cardiac Surgery Centre, Athens, Greece
4. 2nd Department of Internal Medicine, Research Institute and Diabetes Centre, "Attikon" University General Hospital, Athens University Medical School, GR 12462 Haidari, Greece
5. 2nd University Cardiology Department, "Attikon" General Hospital, Athens, Greece
6. 2nd Propaedeutic Department of Internal Medicine, Hippokration University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece