Abstracts of papers presented at the 28th Nordic congress of gastroenterology, the 19th Nordic endoscopic meeting and the 7the SAGIM scientific session : Reykjavík, Iceland, 13-15 June 1996 / edit. B. Thjodleifsson ... [et al.] Vol. 31 Suppl. 217 1996. Oslo : Scandinavian University Press, 1996. 32 s. [1, z toho volných 0, prezenčně 1]