Effects of age and body composition on airway closure in man.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D006801:Humans; D008168:Lung / Q000502:physiology*; D008875:Middle Aged; D011187:Posture; D011652:Pulmonary Circulation; D013147:Spirometry