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.
Smith-McCune KK, Shiboski S, Chirenje MZ, Magure T, Tuveson J, Ma Y, Da Costa M, Moscicki AB, Palefsky JM, Makunike-Mutasa R, Chipato T, van der Straten A, Sawaya GF.Smith-McCune KK, et al.PLoS One. 2010 Apr 8;5(4):e10094. doi: 10.1371/journal.pone.0010094.PLoS One. 2010.PMID: 20386706Free PMC article.