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.
Kanagal-Shamanna R, Zhao W, Vadhan-Raj S, Nguyen MH, Fernandez MH, Medeiros LJ, Bueso-Ramos CE.Kanagal-Shamanna R, et al.Int J Environ Res Public Health. 2012 Aug;9(8):2788-800. doi: 10.3390/ijerph9082788. Epub 2012 Aug 3.Int J Environ Res Public Health. 2012.PMID: 23066397Free PMC article.