THE EVALUTION OF 2590 UPPER GASTROINTESTINAL ENDOSCOPY WERE PERFORMED IN FIRAT UNIVERCITY HOSPITAL IN THE LAST FIVE YEARS - DEMİR, Ali and ONAT, Osman and YILDIRIM, Ahmet and AYTUĞ, Necip and AYHAN, Oğuz (Turkish Journal of Gastroenterology, 1993)