No abstract available
Publication types
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Letter
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Research Support, U.S. Gov't, P.H.S.
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Comment
MeSH terms
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Adolescent
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Asthma / epidemiology
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Asthma / etiology*
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Brazil / epidemiology
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Breast Feeding / adverse effects*
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Child
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Child, Preschool
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Confounding Factors, Epidemiologic
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Humans
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Male
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Risk Assessment
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Risk Factors