The radiographic categorization of coal workers' pneumoconiosis by lay readers.
D000488:Allied Health Personnel / Q000706:statistics & numerical data*; D003032:Coal Mining; D006801:Humans; D009786:Occupational Health Services; D010820:Physicians / Q000706:statistics & numerical data; D011009:Pneumoconiosis / Q000145:classification / Q000175:diagnosis / Q000000981:diagnostic imaging*; D011859:Radiography; D014481:United States