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.
Bauer KR, Brown M, Cress RD, Parise CA, Caggiano V.Bauer KR, et al. Among authors: cress rd.Cancer. 2007 May 1;109(9):1721-8. doi: 10.1002/cncr.22618.Cancer. 2007.PMID: 17387718Free article.