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.
Duran A, Collado-Vides L, Burkepile DE.Duran A, et al.PeerJ. 2016 Nov 2;4:e2643. doi: 10.7717/peerj.2643. eCollection 2016.PeerJ. 2016.PMID: 27833810Free PMC article.