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.
Rütten A, Abu-Omar K, Frahsa A, Morgan A.Rütten A, et al.Soc Sci Med. 2009 Dec;69(11):1667-73. doi: 10.1016/j.socscimed.2009.09.012. Epub 2009 Sep 30.Soc Sci Med. 2009.PMID: 19800160