THE SUBCUTANEOUS EMPHYSEMA AND RETROPERITONEAL PERFORATION CAUSED BY ENDOSCOPIC SPHINCTEROTOMY - YILMAZ, Uğur; ŞAHİN, Tülin and ÜLKER, Aysel and AKOĞLU, Musa and ŞENGÖR, Mehmet and OĞUZ, Perihan (Turkish Journal of Gastroenterology, 1993)