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.
Falah-Hassani K, Kosunen E, Shiri R, Rimpelä A.Falah-Hassani K, et al. Among authors: shiri r.BMC Public Health. 2007 Aug 9;7:201. doi: 10.1186/1471-2458-7-201.BMC Public Health. 2007.PMID: 17688702Free PMC article.