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.
Yassi A, McGill M, Jeanson S.Yassi A, et al.Br J Ind Med. 1990 Sep;47(9):645-6. doi: 10.1136/oem.47.9.645.Br J Ind Med. 1990.PMID: 2145031Free PMC article.No abstract available.
Yassi A, Tate R, Cooper JE, Snow C, Vallentyne S, Khokhar JB.Yassi A, et al.Occup Med (Lond). 1995 Aug;45(4):209-14. doi: 10.1093/occmed/45.4.209.Occup Med (Lond). 1995.PMID: 7662936Clinical Trial.