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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Alleles
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Child
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Child, Preschool
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Cystic Fibrosis / epidemiology*
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Cystic Fibrosis / physiopathology*
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Denmark
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Forced Expiratory Volume
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Humans
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Longitudinal Studies
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Lung / physiopathology*
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Respiratory Function Tests
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Retrospective Studies
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Social Class
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Surveys and Questionnaires