An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Hansen ES, Lander F, Lauritsen JM.Hansen ES, et al.Scand J Work Environ Health. 2007 Dec;33(6):465-9. doi: 10.5271/sjweh.1162.Scand J Work Environ Health. 2007.PMID: 18327515Free article.
Hansen ES.Hansen ES.Scand J Work Environ Health. 1989 Apr;15(2):101-5. doi: 10.5271/sjweh.1875.Scand J Work Environ Health. 1989.PMID: 2772572Free article.
Hansen ES.Hansen ES.Scand J Work Environ Health. 1991 Feb;17(1):20-4. doi: 10.5271/sjweh.1739.Scand J Work Environ Health. 1991.PMID: 2047802Free article.