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.
Marco CA, Larkin GL.Marco CA, et al. Among authors: larkin gl.Acad Emerg Med. 2000 Jun;7(6):691-4. doi: 10.1111/j.1553-2712.2000.tb02049.x.Acad Emerg Med. 2000.PMID: 10905651Free article.