An evaluation of some of the radiologic patterns of small opacities in coal workers' pneumoconioses.
D003032:Coal Mining; D004812:Epidemiologic Methods; D006801:Humans; D009784:Occupational Diseases / Q000000981:diagnostic imaging*; D011009:Pneumoconiosis / Q000000981:diagnostic imaging* / Q000453:epidemiology; D013902:Radiography, Thoracic / Q000592:standards; D009626:Terminology as Topic; D014481:United States