9You VC, BlotWJ, Chang YS, et al. Diet and high risk of stomach cancer in Shangdong [J] .China Cancer Res. 1988.48:3518.
10Kuipers EJ, Klinkenberg-Knol EC, Vandenbroucke - Grau]s CM, Appelmelk BJ, Schenk B E, MeuwissenSG. Role of Helicobacter pylori in the pathogenesis of atrophic gastritis. Scand J Gastroenterol Suppl 1997.223:28-34.