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.
Losina E, Bassett IV, Giddy J, Chetty S, Regan S, Walensky RP, Ross D, Scott CA, Uhler LM, Katz JN, Holst H, Freedberg KA.Losina E, et al. Among authors: katz jn.PLoS One. 2010 Mar 4;5(3):e9538. doi: 10.1371/journal.pone.0009538.PLoS One. 2010.PMID: 20209059Free PMC article.