Department of General Surgery, Fatih Sultan Mehmet Training and Research Hospital, İstanbul, Turkey
2.Department of Gastroenterology, Yeditepe University Faculty of Medicine, İstanbul, Turkey
3.Department of General Surgery, Ankara ÇaĞ Hospital, Ankara
4.Department of General Surgery, Antalya Education and Research Hospital, Antalya
5.Departments of General Surgery and Gastroenterology, Fatih Sultan Mehmet Education and Research Hospital, İstanbul