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.
Thurtell MJ, Tomsak RL, Leigh RJ.Thurtell MJ, et al. Among authors: tomsak rl.Ann N Y Acad Sci. 2009 May;1164:476-8. doi: 10.1111/j.1749-6632.2008.03713.x.Ann N Y Acad Sci. 2009.PMID: 19645952Free PMC article.