295,693 ABSTRACTS Abstracts of papers presented at the Sixteenth Scandinavian Conference on Gastroenterology and the Seventh Scandinavian Meeting on Gastrointestinal Endoscopy. Stavanger- Norway, 1-4 June 1983. Ed. by E. Schrumpf /et al./ Oslo 1983 Universitetsforlaget 4° s. nlb. 2, XIII, nlb. 1, 95 Scandinavian Journal of Gastroenterology, suppl. 86