Small airways disease in coalworkers' pneumoconiosis.
D000402:Airway Obstruction / Q000175:diagnosis*; D001991:Bronchitis; D003032:Coal Mining; D006801:Humans; D008297:Male; D008875:Middle Aged; D009787:Occupational Medicine; D011009:Pneumoconiosis / Q000175:diagnosis*; D012115:Residual Volume; D012119:Respiration; D014109:Total Lung Capacity