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.
Guerra AA Jr, Acúrcio Fde A, Gomes CA, Miralles M, Girardi SN, Werneck GA, Carvalho CL.Guerra AA Jr, et al. Among authors: girardi sn.Rev Panam Salud Publica. 2004 Mar;15(3):168-75. doi: 10.1590/s1020-49892004000300005.Rev Panam Salud Publica. 2004.PMID: 15096289Spanish.