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