Airway conductance: the most sensitive index of abnormality in long-term smokers.
D000328:Adult; D000402:Airway Obstruction / Q000209:etiology*; D000403:Airway Resistance; D001991:Bronchitis / Q000209:etiology; D006801:Humans; D008168:Lung / Q000473:pathology; D008875:Middle Aged; D012907:Smoking / Q000150:complications*; D013997:Time Factors