No abstract available
MeSH terms
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Adolescent
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Age Factors
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Black or African American
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Cough / epidemiology
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Cough / etiology
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Educational Status
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Ethnicity
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Female
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Humans
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Male
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New York
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Parents
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Pneumonia / complications
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Respiratory Tract Diseases / epidemiology
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Respiratory Tract Diseases / etiology*
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Schools
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Sex Factors
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Smoking / complications*
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Smoking / epidemiology
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Social Class
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Students
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White People