No abstract available
MeSH terms
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Chronic Disease
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Colonic Neoplasms / etiology*
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Duodenal Ulcer / etiology*
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Dyspepsia / etiology
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Gastritis / microbiology*
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Helicobacter Infections / complications*
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Helicobacter Infections / microbiology
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Helicobacter pylori / isolation & purification*
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Humans