Hacettepe Univertsity Faculty of Medicine, Departments of General Surgery, Ankara
2.Department of Gastroenterology, Medicana International Ankara Hospital, Ankara
3.Başkent University Faculty of Medicine, Departments of Gastroenterology and Radiology, Ankara
4.Departments of General Surgery, Başkent University Faculty of Medicine, Konya
5.Department of Gastroenterology, Güven Hospital, Ankara
6.Departments of General Surgery, Başkent University Faculty of Medicine, Ankara