Closing volume and the natural history of chronic airway obstruction.
D000367:Age Factors; D002908:Chronic Disease; D003011:Closing Volume; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis*; D008176:Lung Volume Measurements; D008450:Maximal Midexpiratory Flow Rate; D012907:Smoking / Q000150:complications