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.
Sim M, Dick R, Russo J, Bernard B, Grubb P, Krieg E Jr, Mueller C, McCammon C.Sim M, et al.Occup Environ Med. 1997 Apr;54(4):229-35. doi: 10.1136/oem.54.4.229.Occup Environ Med. 1997.PMID: 9166127Free PMC article.
Fritschi L, Beach J, Sim M, Abramson M, Benke G, Musk AW, de Klerk N, McNeil J.Fritschi L, et al.Am J Ind Med. 1999 May;35(5):491-8. doi: 10.1002/(sici)1097-0274(199905)35:5<491::aid-ajim6>3.0.co;2-h.Am J Ind Med. 1999.PMID: 10212702