ENDOSCOPIC ASSESMENT OF UPPER GASTROINTESTINAL SYSTEM IN PATIENTS WITH CHRONIC RENAL FAILURE - ONAT, Osman; DEMİR, Ali and ÇELİKER, Hüseyin and LÜLECİ, Cemal and YILDIRIM, Ahmet and ELMACI, Hüseyin Cahit (Turkish Journal of Gastroenterology, 1993)