title: Screening for early obstruction of the airways: a 1978 reappraisal.
mesh_terms: D000402:Airway Obstruction / Q000175:diagnosis / Q000209:etiology / Q000517:prevention & control*; D003011:Closing Volume; D005541:Forced Expiratory Volume; D006801:Humans; D012907:Smoking / Q000150:complications