1. Department of Surgery, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece
2. Department of Colorectal Surgery, Addenbrooke’s Hospital, Cambridge CB2 2QQ, UK
3. Uni-Pharma S.A., 14564 Athens, Greece
4. Laboratory of Pharmacology, Faculty of Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece