1. 1st Department of Psychiatry, Eginition Hospital, Athens University Medical School, 11528 Athens, Greece
2. University Mental Health Research Institute, 11527 Athens, Greece
3. 2nd Department of Internal Medicine, Research Institute and Diabetes Center, Athens University Medical School, Attikon University Hospital, 12462 Athens, Greece
4. Hellenic National Center for Research, Prevention and Treatment of Diabetes Mellitus and Its Complications (HNDC), Athens, Greece