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.
Wolfram L, Fischbeck A, Frey-Wagner I, Wojtal KA, Lang S, Fried M, Vavricka SR, Hausmann M, Rogler G.Wolfram L, et al. Among authors: fried m.PLoS One. 2013 Oct 16;8(10):e76350. doi: 10.1371/journal.pone.0076350. eCollection 2013.PLoS One. 2013.PMID: 24146856Free PMC article.