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.
Labruna MB, de Paula CD, Lima TF, Sana DA.Labruna MB, et al.Mem Inst Oswaldo Cruz. 2002 Dec;97(8):1133-6. doi: 10.1590/s0074-02762002000800012. Epub 2003 Jan 20.Mem Inst Oswaldo Cruz. 2002.PMID: 12563479Free article.