No abstract available
MeSH terms
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Female
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Humans
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Incidence
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Male
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Pulmonary Disease, Chronic Obstructive / epidemiology
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Pulmonary Disease, Chronic Obstructive / etiology*
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Pulmonary Disease, Chronic Obstructive / physiopathology
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Respiratory Function Tests
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Risk Factors
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Smoking / adverse effects*
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Smoking / epidemiology
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United States / epidemiology