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.
Fernández ME, Gonzales A, Tortolero-Luna G, Williams J, Saavedra-Embesi M, Chan W, Vernon SW.Fernández ME, et al. Among authors: chan w.Am J Public Health. 2009 May;99(5):936-43. doi: 10.2105/AJPH.2008.136713. Epub 2009 Mar 19.Am J Public Health. 2009.PMID: 19299678Free PMC article.
Misra S, Lairson DR, Chan W, Chang YC, Bartholomew LK, Greisinger A, McQueen A, Vernon SW.Misra S, et al. Among authors: chan w.J Prev Med Public Health. 2011 May;44(3):101-10. doi: 10.3961/jpmph.2011.44.3.101.J Prev Med Public Health. 2011.PMID: 21617335Free PMC article.Clinical Trial.