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.
Hofherr SE, Adams KE, Chen CY, May S, Weaver EA, Barry MA.Hofherr SE, et al. Among authors: chen cy.PLoS One. 2011 Feb 15;6(2):e17076. doi: 10.1371/journal.pone.0017076.PLoS One. 2011.PMID: 21347236Free PMC article.