ÜNSAL, B.; ALTINAY, Z. A.; KARA, B.; KARAOĞLU, A. Önder; YAZICIOĞLU, N.; KARACA, H.; KOŞAY, S. DRUG-INDUCED UPPER GASTROINTESTINAL SYSTEM BLEEDINGS: AN EVALUATION OF THE PATIENTS HOSPITALIZED FROM UPPER GIS BLEEDING BETWEEN 1987 AND 1991 YEARS. Turkish Journal of Gastroenterology 1993, 4, 460-462.