No abstract available
MeSH terms
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Adult
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Age Factors
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Aged
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Female
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Humans
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Male
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Middle Aged
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Neoplasms / prevention & control*
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Nicotiana / analysis
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Nicotine / analysis
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Plants, Toxic
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Risk Factors
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Sex Factors
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Smoking / epidemiology*
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Smoking / ethnology
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Surveys and Questionnaires
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Tars / analysis