No abstract available
MeSH terms
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Cimetidine / adverse effects
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Confounding Factors, Epidemiologic
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Histamine H2 Antagonists / adverse effects
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Humans
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Incidence
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Ranitidine / adverse effects
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Risk Factors
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Stomach Neoplasms / chemically induced
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Stomach Neoplasms / epidemiology*
Substances
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Histamine H2 Antagonists
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Cimetidine
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Ranitidine