Early detection of expiratory airflow obstruction in cement workers.
D000402:Airway Obstruction / Q000175:diagnosis*; D005541:Forced Expiratory Volume; D006801:Humans; D008448:Maximal Expiratory Flow Rate; D008450:Maximal Midexpiratory Flow Rate; D009790:Occupations; D012129:Respiratory Function Tests; D013147:Spirometry; D014797:Vital Capacity