Abstracts of papers presented at the 23rd Scandinavian conference on gastroenterology and the 14th Scandinavian meeting on gastrointestinal endoscopy, Reykjavik, Iceland, 14-16 June, 1990 / edit. E. Oddsson, H. Gudjonsson, B. Thjodleifsson Vol. 25 Suppl. 176 1990. Oslo : Universitetsforlaget, 1990. 104 s. [1, z toho volných 0, prezenčně 1]