No abstract available
MeSH terms
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Adolescent
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Child
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Child, Preschool
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Female
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Humans
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Lung / physiopathology
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Male
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Prospective Studies
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Respiratory Function Tests
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Respiratory Tract Infections* / epidemiology
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Respiratory Tract Infections* / microbiology
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South Africa / epidemiology
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Tuberculosis, Pulmonary* / epidemiology