Pulmonary function in coal miners' pneumoconiosis.
D000402:Airway Obstruction / Q000503:physiopathology; D000403:Airway Resistance; D003032:Coal Mining; D006801:Humans; D008168:Lung / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011009:Pneumoconiosis / Q000503:physiopathology*; D012129:Respiratory Function Tests; D013147:Spirometry; D013997:Time Factors