1. Department of General Surgery, Medical School, University of Balıkesir, 10145 Balıkesir, Turkey
2. Department of General Surgery, Trabzon Numune Training and Research Hospital, 61040 Trabzon, Turkey
3. Department of General Surgery, Medical School, University of Bozok, 66900 Yozgat, Turkey
4. Department of General Surgery, Mengucek Gazi Training and Research Hospital, Erzincan University, 24100 Erzincan, Turkey
5. Pathology Department, Mus State Hospital, 49000 Mus, Turkey