title: Emphysema in pathogen-free and bronchitic rats: an electronic lung-scanning technique.
mesh_terms: D000367:Age Factors; D000818:Animals; D001991:Bronchitis / Q000150:complications* / Q000473:pathology; D004582:Electronics, Medical; D005856:Germ-Free Life; D008297:Male; D008722:Methods; D011650:Pulmonary Alveoli / Q000473:pathology*; D011656:Pulmonary Emphysema / Q000209:etiology* / Q000473:pathology; D051381:Rats