Şahin Çoban1, Ilhami Yüksel1, Metin Küçükazman2, Ömer Başar1. 1. Department of Gastroenterology, Dışkapı Yıldırım Beyazıt Education and Research Hospital, Ankara, Turkey. 2. Department of Gastroenterology, Kecioren Education and Research Hospital, Ankara, Turkey.