Effects of age and body position on "airway closure" in man.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008168:Lung / Q000033:anatomy & histology / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D011187:Posture; D013147:Spirometry