EFFECT OF DILTIAZEM ON INTERDIGESTIVE GALLBLADDER . VOLUME AND POSTPRANDIAL GALLBLADDER EMPTYING IN NORMAL SUBJECTS - ÖZÜTEMİZ, A. Ömer and TEKEŞİN, Oktay and İLTER, Tankut and YÖNETCİ, Nadir and; ĞLU, Ahmet (Turkish Journal of Gastroenterology, 1993)