195,228 ABSTRACTS Abstracts of papers presented at the Eleventh Scandinavian Conference on Gastroenterology and The Third Scandinavian Meeting on Gastrointestinal Endoscopy August 25-27, 1977,Lillehammer,Norway,Ed.by A.Berstad /et al./ Oslo 1977 Universitetsforl,4° s. 118 Scandinavian Journal of Gastroenterology, suppl. 45