The spirit of occupational medicine.
D004739:England; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007558:Italy; D007883:Legislation, Medical; D009784:Occupational Diseases / Q000209:etiology / Q000517:prevention & control; D009787:Occupational Medicine / Q000266:history* / Q000639:trends; D012449:Safety