title: Does simple pneumoconiosis of coal-workers cause disability?
mesh_terms: D003032:Coal Mining; D004185:Disability Evaluation; D004391:Dust; D004781:Environmental Exposure; D006801:Humans; D008297:Male; D008875:Middle Aged; D011009:Pneumoconiosis / Q000453:epidemiology; D012129:Respiratory Function Tests; D012907:Smoking; D013997:Time Factors
chemical_list: D004391:Dust