1. Chronic gastritis and gastroduodenal ulcer: a case control study on risk of coexisting duodenal or gastric ulcer in patients with gastritis. Issue 7 (July 1989) Authors: Sipponen, P; Seppälä, K; Aärynen, M; Helske, T; Kettunen, P Journal: Gut Issue: Volume 30:Issue 7(1989) Page Start: 922 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Fall in the prevalence of chronic gastritis over 15 years: analysis of outpatient series in Finland from 1977, 1985, and 1992. Issue 9 (September 1994) Authors: Sipponen, P; Helske, T; Järvinen, P; Hyvärinen, H; Seppälä, K; Siurala, M Journal: Gut Issue: Volume 35:Issue 9(1994) Page Start: 1167 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗