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.
Birbrair A, Wang ZM, Messi ML, Enikolopov GN, Delbono O.Birbrair A, et al.PLoS One. 2011 Feb 3;6(2):e16816. doi: 10.1371/journal.pone.0016816.PLoS One. 2011.PMID: 21304812Free PMC article.
Zhang T, Choi SJ, Wang ZM, Birbrair A, Messi ML, Jin JP, Marsh AP, Nicklas B, Delbono O.Zhang T, et al. Among authors: birbrair a.J Gerontol A Biol Sci Med Sci. 2014 Dec;69(12):1437-47. doi: 10.1093/gerona/glt204. Epub 2013 Dec 24.J Gerontol A Biol Sci Med Sci. 2014.PMID: 24368775Free PMC article.