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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Air Pollution* / analysis
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Bronchitis / epidemiology*
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Cough / epidemiology
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Educational Status
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Environmental Exposure
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Environmental Health
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Female
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Humans
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Middle Aged
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Mucus / metabolism
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New York
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Smoking*
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Social Class
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Sulfur Dioxide / analysis
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Urban Population*