title: A population-based study of bronchial asthma in adult twin pairs.
authors.forename: D L
authors.initials: DL
authors.lastname: Duffy
mesh_terms: 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