title: Small airways disease.
authors.forename: S A
authors.initials: SA
authors.lastname: Yousem
mesh_terms: D001980:Bronchi / Q000473:pathology* / Q000503:physiopathology; D001988:Bronchiolitis / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D008171:Lung Diseases / Q000473:pathology* / Q000503:physiopathology