546,598 ABSTRACTS Abstracts of papers presented at the twenty-first Scandinavian Conference on Gastroenterology and the Twelfth Scandinavian Meeting on gastrointestinal endoscopy Turku, Finland, 2-4 June 1988 / ed. by T. Havia, E. Kivilaakso and T. Schroder ; with technical assistance of M-L. Vuorinen. - Oslo : Norwegian Univ. Press, 1988. - [2], 120 s. ; 25 cm (Scandinavian Journal of Gastroenterology, ISSN 0085-5928 ; vol. 23, suppl. 145)