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.
Cheong SA, Tan TL, Chen CC, Chang WL, Liu Z, Chew LY, Sloot PM, Johnson NF.Cheong SA, et al.Sci Rep. 2014 Jan 10;4:3624. doi: 10.1038/srep03624.Sci Rep. 2014.PMID: 24406467Free PMC article.