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.
Kerns W 2nd, Schroeder D, Williams C, Tomaszewski C, Raymond R.Kerns W 2nd, et al.Ann Emerg Med. 1997 Jun;29(6):748-57. doi: 10.1016/s0196-0644(97)70196-3.Ann Emerg Med. 1997.PMID: 9174520
Kerns W 2nd, Ransom M, Tomaszewski C, Raymond R.Kerns W 2nd, et al.Acad Emerg Med. 1997 Jun;4(6):545-51. doi: 10.1111/j.1553-2712.1997.tb03576.x.Acad Emerg Med. 1997.PMID: 9189185Free article.