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.
Cherrington A, Martin MY, Hayes M, Halanych JH, Wright MA, Appel SJ, Andreae SJ, Safford M.Cherrington A, et al. Among authors: safford m.Prev Chronic Dis. 2012;9:E36. doi: 10.5888/pcd9.110053. Epub 2012 Jan 12.Prev Chronic Dis. 2012.PMID: 22239751Free PMC article.Review.
Halanych JH, Safford MM, Kertesz SG, Pletcher MJ, Kim YI, Person SD, Lewis CE, Kiefe CI.Halanych JH, et al. Among authors: safford mm.Am J Epidemiol. 2010 Mar 1;171(5):532-9. doi: 10.1093/aje/kwp417. Epub 2010 Jan 29.Am J Epidemiol. 2010.PMID: 20118194Free PMC article.