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Scandinavian Journal of Gastroenterology. Supplement|January 1, 1985
Duodenogastric reflux in patients with upper abdominal complaints or gastric ulcer with particular reference to reflux-associated gastritisS NiemeläCanadian Journal of Microbiology|February 1, 1977
Effects of clear-cutting on the composition of bacterial populations of northern spruce forest soilS Niemelä, V SundmanScandinavian Journal of Gastroenterology|October 1, 1984
Duodenogastric bile reflux in patients with gastric ulcerS Niemelä, J Heikkilä, J LehtolaScandinavian Journal of Gastroenterology|May 1, 1987
Campylobacter-like organisms in patients with gastric ulcerS Niemelä, T Karttunen, J LehtolaScandinavian Journal of Gastroenterology. Supplement|January 1, 1991
Helicobacter pylori in dyspeptic patients: quantitative association with severity of gastritis, intragastric pH, and serum gastrin concentrationT Karttunen, S Niemelä, J LehtolaScandinavian Journal of Gastroenterology|May 1, 1995
Chronic gastritis in patients with gastric ulcer; a 10-year follow-upS Niemelä, T Karttunen, T KerolaScandinavian Journal of Gastroenterology|June 1, 1995
Helicobacter pylori-associated gastritis. Evolution of histologic changes over 10 yearsS Niemelä, T Karttunen, T KerolaAnnals of Clinical Research|August 1, 1983
Duodenogastric bile reflux as measured by an isotope technique and its correlation with endoscopic findingsS Niemelä, J Heikkilä, J LehtolaApplied and Environmental Microbiology|November 1, 1979
Two improved methods for obtaining axenic cultures of cyanobacteriaT Vaara, M Vaara, S NiemeläDigestive Diseases and Sciences|July 1, 1996
Blood leukocyte differential in Helicobacter pylori infectionT J Karttunen, S Niemelä, T KerolaPageof 6