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.
Jedrychowski W, Maugeri U, Jedrychowska-Bianchi I, Mróz E.Jedrychowski W, et al.Environ Health Perspect. 2002 Jun;110(6):571-4. doi: 10.1289/ehp.02110571.Environ Health Perspect. 2002.PMID: 12055047Free PMC article.