No abstract available
MeSH terms
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Female
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Helicobacter Infections
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Helicobacter pylori
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Humans
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Male
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Neoplasms, Multiple Primary* / epidemiology
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Neoplasms, Second Primary* / epidemiology
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Portugal / epidemiology
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Risk Factors
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Stomach Neoplasms* / epidemiology
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Stomach Neoplasms* / genetics