A population-based study of bronchial asthma in adult twin pairs.
Duffy
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D000328:Adult; D001249:Asthma / Q000453:epidemiology*; D004200:Diseases in Twins / Q000453:epidemiology*; D006801:Humans; D012107:Research Design; D012737:Sex Factors; D013223:Statistics as Topic / Q000379:methods