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.
Chang AJ, Sohn R, Lu ZH, Arbeit JM, Lapi SE.Chang AJ, et al. Among authors: lapi se.PLoS One. 2013;8(3):e58949. doi: 10.1371/journal.pone.0058949. Epub 2013 Mar 14.PLoS One. 2013.PMID: 23516584Free PMC article.