title: Coal workers' pneumoconiosis--state of knowledge and research needs.
mesh_terms: D000328:Adult; D000368:Aged; D003032:Coal Mining; D004781:Environmental Exposure; D006801:Humans; D008168:Lung / Q000473:pathology; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D009784:Occupational Diseases; D011009:Pneumoconiosis / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology / Q000517:prevention & control; D011859:Radiography; D012129:Respiratory Function Tests; D012907:Smoking; D014481:United States