Investigation of intrinsic disturbance wave near the end of expiration.
D000328:Adult; D003011:Closing Volume; D005540:Forced Expiratory Flow Rates; D006801:Humans; D008168:Lung / Q000502:physiology / Q000503:physiopathology; D008173:Lung Diseases, Obstructive / Q000175:diagnosis / Q000503:physiopathology; D008449:Maximal Expiratory Flow-Volume Curves; D008875:Middle Aged; D012119:Respiration; D012129:Respiratory Function Tests / Q000379:methods*