No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
MeSH terms
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Adolescent
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Agriculture*
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Asthma / epidemiology
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Asthma / etiology*
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Asthma / physiopathology
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Child
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Cohort Studies
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Female
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Germany / epidemiology
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Humans
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Hygiene Hypothesis*
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Incidence
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Logistic Models
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Male
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Prospective Studies
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Residence Characteristics*
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Sex Factors