1. 2nd Propedeutical Department of Surgery, Hippokration General Hospital, Thessaloniki, Greece.
2. Aristotelian University of Thessaloniki; 2nd Propedeutical Department of Internal Medicine, Hippokration General Hospital, Thessaloniki, Greece.
3. Aristotelian University of Thessaloniki; Department of Pathology, Hippokration General Hospital, Thessaloniki, Greece.