1Docley CP,Cohen H,Fizgibbons PL,et al.Prevalence of Helicobacter pylori infection and histologic gastritis in asymptomatic persons[J].N Engl J Med,1989,321:1562.
2Megraud F,Brassens-Rabbe MP,Denis F,et al.Seroepidemiology of Campylobacter pylori infectionin in various populations[J].J Clin Microbiol,1989,27:1870.
3Raham DY,Adam E,Reddy GT,et al.Seroepidemiology of Helicobacter pylori infection in india.Comparison of developing and developed countries[J].Dig Dis Sci,1991,36:1084.