title: [Characteristics of the small airway area and etiology of airway diseases].
mesh_terms: D001980:Bronchi / Q000033:anatomy & histology* / Q000473:pathology; D001991:Bronchitis / Q000209:etiology / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011650:Pulmonary Alveoli / Q000473:pathology