1. Department of Surgery, Nicosia Government Hospital, Palaios Dromos Lefkosias-Lemesou, No. 215, Strovolos, 2029 Nicosia, Cyprus
2. Department of Academic Surgery, Royal Marsden Hospital, Upper GI/HPB Unit, Fulham Road, London SW3 6JJ, UK
3. Department of Pathology, Nicosia Government Hospital, Palaios Dromos Lefkosias-Lemesou, No. 215, Strovolos, 2029 Nicosia, Cyprus
4. Laiko General Hospital, Athens Medical School, National and Kapodistrian University, Agiou Thoma 17, 11527 Athens, Greece