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.
Sam K, Poublanc J, Sobczyk O, Han JS, Battisti-Charbonney A, Mandell DM, Tymianski M, Crawley AP, Fisher JA, Mikulis DJ.Sam K, et al. Among authors: crawley ap.BMJ Open. 2015 Feb 11;5(2):e006014. doi: 10.1136/bmjopen-2014-006014.BMJ Open. 2015.PMID: 25673438Free PMC article.