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.
Wan W, Powers AS, Li J, Ji L, Erikson JM, Zhang JQ.Wan W, et al. Among authors: zhang jq.Am J Med Sci. 2007 Oct;334(4):265-73. doi: 10.1097/MAJ.0b013e318068b5ed.Am J Med Sci. 2007.PMID: 18030183