title: Frequency dependent changes of gas distribution in long-term cigarette smokers.
mesh_terms: D001991:Bronchitis / Q000503:physiopathology; D006801:Humans; D008168:Lung / Q000503:physiopathology*; D008170:Lung Compliance; D012123:Pulmonary Ventilation; D012907:Smoking / Q000503:physiopathology*; D013997:Time Factors