QVIST N. 305.180 ABSTRACTS 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.] : Scandinavian University Press, 1997. - 71 s. ; 28 cm. -(Scandinavian Journal ; Gastroenterology, 0085-5928 ; vol.32, suppl.224)