7Nomura AM, Stemmermann GN, Chyou PH, et al. Helicobacter pylori infection and risk for duodenal and gastric ulceration [J].Ann InternMed, 1994, 120: 977-981.
8Kuipers EJ, Uyterlinde AM, Pena AS, et al. Longterm sequaelae of Helicobacter pylori gastritis[J]. Lancet, 1995,345: 1525-1528.
9Dixon MF, Genta RM, Yardley JH, et al. Classification and grading of gastritis [J]. Am J Surg Pathol , 1996, 20(6) : 1161-1181.
10Di Napoli A, Petrion R, Boero M, et al. Quantitative assess ment of histologic changes in chronic gastritis after eradication of Helicobacter pylori.[J]. J Clin Pathol, 1992,45 : 796-798.
