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Risk Factors
Incidence
Cohort Studies
Multivariate Analysis
Helicobacter Infections
Diarrhea
HIV Infections
Helicobacter pylori
Infants
Disease Outbreaks
HIV Seropositivity
United States
Illinois
California
Case Control Studies
Population Surveillance
Antibodies, Bacterial
Bacterial Proteins
Intravenous Substance Abuse
Disease Progression
Co-Publications
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