title: Historical perspectives of coal workers' pneumoconiosis in the United States.
mesh_terms: D003032:Coal Mining / Q000266:history*; D003226:Congresses as Topic / Q000266:history; D004391:Dust; D004502:Education, Medical, Continuing; D006077:Government Agencies; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D049691:History, Medieval; D006801:Humans; D007883:Legislation, Medical; D011009:Pneumoconiosis / Q000145:classification / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000266:history* / Q000401:mortality; D011658:Pulmonary Fibrosis / Q000145:classification; D011859:Radiography; D012829:Silicosis / Q000145:classification; D013997:Time Factors; D014481:United States
chemical_list: D004391:Dust