A radiological study of the effects of smoking on regional differences in the lung.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D006801:Humans; D008168:Lung / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D008173:Lung Diseases, Obstructive / Q000000981:diagnostic imaging / Q000209:etiology; D008297:Male; D008451:Maximal Voluntary Ventilation; D008875:Middle Aged; D011859:Radiography; D012907:Smoking / Q000150:complications