title: Origins of atopy in pediatric asthma.
authors.forename: David L
authors.initials: DL
authors.lastname: Hahn
mesh_terms: D001249:Asthma / Q000209:etiology* / Q000382:microbiology; D001992:Bronchoalveolar Lavage Fluid / Q000382:microbiology; D002675:Child, Preschool; D016993:Chlamydophila pneumoniae / Q000302:isolation & purification; D006801:Humans; D006967:Hypersensitivity / Q000150:complications* / Q000209:etiology*