Letter: Disability and coal workers' pneumoconiosis.
D001991:Bronchitis / Q000150:complications; D003032:Coal Mining; D003371:Cough / Q000150:complications; D004185:Disability Evaluation; D006801:Humans; D008017:Life Expectancy; D008168:Lung / Q000503:physiopathology; D008173:Lung Diseases, Obstructive / Q000175:diagnosis; D008297:Male; D011009:Pneumoconiosis / Q000175:diagnosis* / Q000453:epidemiology