Institution: | istein Hovde,yvind Haugen Lie,Per Arthur Johansson,ystein Stubhaug,Department of Gastroenterology/Internal Medicine,Innlandet Hospital Trust,2819 Gjvik,Norway Egil Johnson,Department of Pediatric and Gastroenterological Surgery,Oslo University Hospital Ullev l,0450 Oslo,Norway Egil Johnson,Faculty of Medicine,University of Oslo,0318 Oslo,Norway Bjrn Hofstad,Truls Hauge,Department of Gastroenterology,Oslo University Hospital Ullev l,0450 Oslo,Norway |