1. Division of Cardiology, Aristotelian University and Hippocration Hospital, Thessaloniki, Greece
2. Atherosclerosis Unit, Aristotelian University and Hippocration Hospital, Thessaloniki, Greece
3. Department of Internal Medicine, Aristotelian University and Hippocration Hospital, Thessaloniki, Greece
4. Division of Cardiology, Ohio State University, Columbus, Ohio 43210, USA