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.
Salem AE, Abd El-Ati N, Mahmoud G.Salem AE, et al. Among authors: mahmoud g.Front Biosci (Elite Ed). 2013 Jun 1;5(3):798-808. doi: 10.2741/e660.Front Biosci (Elite Ed). 2013.PMID: 23747896Free article.