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.
Villar-Gómez A, Muñoz X, Culebras M, Morell F, Cruz MJ.Villar-Gómez A, et al. Among authors: morell f.Scand J Work Environ Health. 2009 Dec;35(6):475-8. doi: 10.5271/sjweh.1359. Epub 2009 Oct 2.Scand J Work Environ Health. 2009.PMID: 19806278Free article.