title: Asthma's changing prevalence.
authors.forename: J
authors.initials: J
authors.lastname: Britton
mesh_terms: D001249:Asthma / Q000175:diagnosis / Q000453:epidemiology*; D002648:Child; D004739:England / Q000453:epidemiology; D006801:Humans; D015995:Prevalence; D012135:Respiratory Sounds / Q000209:etiology; D014852:Wales / Q000453:epidemiology