title: A comparative study of four methods of assessing the morphologic changes in chronic bronchitis.
mesh_terms: D000328:Adult; D001980:Bronchi / Q000473:pathology*; D001991:Bronchitis / Q000473:pathology*; D002356:Cartilage / Q000473:pathology; D002452:Cell Count; D002908:Chronic Disease; D003238:Connective Tissue / Q000473:pathology; D006652:Histological Techniques; D006801:Humans; D008722:Methods; D009092:Mucous Membrane / Q000473:pathology; D009130:Muscle, Smooth / Q000473:pathology; D012704:Serous Membrane / Q000473:pathology