No abstract available
MeSH terms
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Adult
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Age Factors
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Asthma / diagnosis
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Boston
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Bronchitis / diagnosis
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Cough
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Environmental Exposure
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Hair / analysis
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Humans
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Lead / analysis
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Lung Diseases, Obstructive / chemically induced*
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Lung Diseases, Obstructive / diagnosis
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Male
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Middle Aged
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Occupational Diseases / chemically induced
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Occupations
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Prospective Studies
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Respiratory Tract Diseases / diagnosis
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Smoking
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Surveys and Questionnaires
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Vehicle Emissions*