ANDERSEN LEIF PERCIVAL 304,538 EUROPEAN European Helicobacter pylori Study Group IXth International Workshop on Gastroduodenal Pathology and Helicobacter pylori 16-19 October 1996 Copenhagen, Denmark : accepted abstracts / [Leif Percival Andersen president EHPSG, Francis Hegraud secretary, Peter A. Krasilnikoff president Local Org. Comm.] -[London : BMJ Publ. Group, 1996]. - VII, 131 s. : wykr. ; 30 cm (Gut, ISSN 0017-5849 ; vol. 39, suppl. nr 2)