No abstract available
Publication types
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Letter
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Asia / epidemiology
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Case-Control Studies
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Confounding Factors, Epidemiologic
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Educational Status*
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Europe / epidemiology
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Female
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Humans
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Incidence
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Lung Neoplasms / epidemiology*
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Male
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North America / epidemiology
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Smoking / epidemiology*
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Socioeconomic Factors