Relative value of various spirometric tests in the early detection of chronic obstructive pulmonary disease.
D000328:Adult; D000368:Aged; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D013147:Spirometry; D013997:Time Factors