1. First Propedeutic Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA Hospital, Thessaloniki, Greece
2. Department of Pathology, Medical School, Aristotle University of Thessaloniki, AHEPA Hospital, Thessaloniki, Greece
3. Division of Vascular Surgery, Second Department of Surgery, Medical School, Aristotle University of Thessaloniki, G. Gennimatas Hospital, Thessaloniki, Greece
4. Department of Microbiology, Medical School, Aristotle University of Thessaloniki, AHEPA Hospital, Thessaloniki, Greece