MALIGNANCIES DETERMINED BY UPPER GASTROINTESTINAL SYSTEM ENDOSCOPY IN 1400 CASES - SARIÇAM, Tülay; VARDARELİ, Eser; HARMANCI, Ayşegül; KIŞIOĞLU, Yekta; KEBAPÇI, Nur; ERENOĞLU, Esat (Turkish Journal of Gastroenterology, 1994)