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.
Chapman R, White RG, Shafer LA, Pettifor A, Mugurungi O, Ross D, Pascoe S, Cowan FM, Grosskurth H, Buve A, Hayes RJ.Chapman R, et al. Among authors: shafer la.Trop Med Int Health. 2010 May;15(5):554-66. doi: 10.1111/j.1365-3156.2010.02483.x. Epub 2010 Mar 16.Trop Med Int Health. 2010.PMID: 20345559Free article.