title: Early detection of chronic bronchitis and pulmonary emphysema.
mesh_terms: D000402:Airway Obstruction / Q000175:diagnosis; D000403:Airway Resistance; D001991:Bronchitis / Q000175:diagnosis*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008170:Lung Compliance; D008176:Lung Volume Measurements; D008297:Male; D008403:Mass Screening; D008448:Maximal Expiratory Flow Rate; D009584:Nitrogen / Q000378:metabolism; D011446:Prospective Studies; D011650:Pulmonary Alveoli / Q000378:metabolism; D011656:Pulmonary Emphysema / Q000175:diagnosis*; D012129:Respiratory Function Tests
chemical_list: D009584:Nitrogen