Abstracts of papers presented at the 30th Nordic meeting of gastroenterology, the 21st Nordic meeting of endoscopy and the 9th SAGIM scientific session : Oulu, Finland, 3-6 June 1998 / edit. T. J. Karttunen ... [et al.] Vol. 33 Suppl. 227 1998. Oslo : Scandinavian University Press, 1998. 36 s. [1, z toho volných 0, prezenčně 1]