title: A longitudinal study of bronchitic symptoms and spirometry in a middle-aged, male, industrial population.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000402:Airway Obstruction / Q000209:etiology; D001991:Bronchitis / Q000150:complications / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology / Q000503:physiopathology; D003371:Cough / Q000209:etiology; D004417:Dyspnea / Q000209:etiology; D006801:Humans; D007087:Illinois; D008297:Male; D008875:Middle Aged; D009787:Occupational Medicine; D009790:Occupations; D012119:Respiration; D012131:Respiratory Insufficiency / Q000209:etiology; D012907:Smoking / Q000150:complications; D013147:Spirometry