Cigarette smoking and diffuse pulmonary fibrosis.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002908:Chronic Disease; D005260:Female; D006306:Health Surveys; D006801:Humans; D008171:Lung Diseases; D008297:Male; D008875:Middle Aged; D010414:Pennsylvania; D011658:Pulmonary Fibrosis / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000209:etiology*; D011859:Radiography; D012140:Respiratory Tract Diseases / Q000453:epidemiology; D012737:Sex Factors; D012907:Smoking; D013147:Spirometry