ABSTRACTS 305.180 Abstracts of papers presented at the Twenty-Ninth Nordic Congress of Gastroenterology, the Twentieth Nordic Endoscopic Meeting and the Eighth SAGIM Scientific Sessions / ed. by K. Lauritsen T. Havelund, T. Knudsen and N. Qvist. -Oslo [etc.] s Scandinavian University Press, 1997. - 71 s. ; 28 cm. -(Scandinavian Journal of Gastroenterology 0085-5928 ; vol.32, .224)