Study of lung function changes among different grades of byssinosis.
D000402:Airway Obstruction; D001249:Asthma / Q000503:physiopathology; D001991:Bronchitis / Q000503:physiopathology; D002095:Byssinosis / Q000503:physiopathology; D002908:Chronic Disease; D004781:Environmental Exposure; D006801:Humans; D011009:Pneumoconiosis / Q000503:physiopathology*; D012123:Pulmonary Ventilation; D012119:Respiration; D013147:Spirometry; D014797:Vital Capacity