No abstract available
MeSH terms
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Adult
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Age Distribution
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Child
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Child, Preschool
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Cohort Studies
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Epidemiologic Methods
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Female
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Gastrointestinal Diseases / diagnosis
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Gastrointestinal Diseases / epidemiology*
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Helicobacter Infections / diagnosis
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Helicobacter Infections / epidemiology*
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Helicobacter pylori / isolation & purification*
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Humans
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Male
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Risk Factors
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Sex Distribution