No abstract available
MeSH terms
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Asthma / epidemiology*
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Asthma / genetics*
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China / epidemiology
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Comorbidity
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Female
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Genetic Markers / genetics
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Humans
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Male
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Polymorphism, Genetic*
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Receptors, Adrenergic, beta-2 / genetics*
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Respiratory Function Tests
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Smoking / epidemiology*
Substances
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Genetic Markers
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Receptors, Adrenergic, beta-2