Department of Gastroenterology, Haydarpaşa Training and Research Hospital, İstanbul, Turkey
2.Department of Gastroenterology, Kocaeli Derince Education and Research Hospital, Kocaeli
3.Department of Gastroenterohepatology, Haydarpasa Numune Training and Research Hospital, İstanbul
4.Departments of Pathology and General Surgery, Haydarpaşa Numune Education and Research Hospital, İstanbul
5.Department of Gastroenterohepatology, Çamlıca Erdem Hospital, İstanbul, Turkey