Abstracts of papers presented at the 31st Nordic meeting on gastroenterology, the 22nd SADE meeting on GI endoscopy and the 10th SAGIM scientific session on gastrointestinal motility : Tromso, Norway, 2-5 June 1999. Oslo : Scandinavian University Press, 1999. V, 18 s. Scandinavian Journal of Gastroenterology Suppl. 229.