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.
Farrelly MC, Davis KC, Duke J, Messeri P.Farrelly MC, et al. Among authors: davis kc.Health Educ Res. 2009 Feb;24(1):42-8. doi: 10.1093/her/cym087. Epub 2008 Jan 17.Health Educ Res. 2009.PMID: 18203679
Davis KC, Farrelly MC, Messeri P, Duke J.Davis KC, et al.Int J Environ Res Public Health. 2009 Feb;6(2):722-40. doi: 10.3390/ijerph6020722. Epub 2009 Feb 19.Int J Environ Res Public Health. 2009.PMID: 19440412Free PMC article.
Davis KC, Crankshaw E, Farrelly MC, Niederdeppe J, Watson K.Davis KC, et al.Am J Health Promot. 2011 Jan-Feb;25(3):176-85. doi: 10.4278/ajhp.090211-QUAN-59.Am J Health Promot. 2011.PMID: 21192747