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.
Vermeulen MJ, Stukel TA, Guttmann A, Rowe BH, Zwarenstein M, Golden B, Nigam A, Anderson G, Bell RS, Schull MJ; ED Investigator Team.Vermeulen MJ, et al.Ann Emerg Med. 2014 Nov;64(5):427-38. doi: 10.1016/j.annemergmed.2014.06.007. Epub 2014 Jul 3.Ann Emerg Med. 2014.PMID: 24999281Free article.