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.
Wisotzky M, Albuquerque M, Pechacek TF, Park BZ.Wisotzky M, et al.Public Health Rep. 2004 May-Jun;119(3):303-10. doi: 10.1016/j.phr.2004.04.009.Public Health Rep. 2004.PMID: 15158109Free PMC article.
Nelson DE, Mowery P, Asman K, Pederson LL, O'Malley PM, Malarcher A, Maibach EW, Pechacek TF.Nelson DE, et al.Am J Public Health. 2008 May;98(5):905-15. doi: 10.2105/AJPH.2007.115931. Epub 2008 Apr 1.Am J Public Health. 2008.PMID: 18382001Free PMC article.