1. 1st Department of General Surgery and Vascular Surgery, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Thessaloniki, Greece, a_saratzis@ yahoo.gr
2. Department of Rheumatology, Russells Hall Hospital, Dudley, United Kingdom
3. 1st Department of General Surgery and Vascular Surgery, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Thessaloniki, Greece