Recent developments in occupational medical services.
D005062:European Union; D049672:History, 19th Century; D049673:History, 20th Century; D009314:National Institute for Occupational Safety and Health, U.S.; D016272:Occupational Health / Q000266:history / Q000331:legislation & jurisprudence; D009786:Occupational Health Services / Q000266:history / Q000639:trends*; D006113:United Kingdom; D014481:United States