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.
Zakariassen E, Hunskaar S.Zakariassen E, et al.Scand J Prim Health Care. 2008;26(2):123-8. doi: 10.1080/02813430801990302.Scand J Prim Health Care. 2008.PMID: 18570012Free PMC article.
Zakariassen E, Sandvik H, Hunskaar S.Zakariassen E, et al.Emerg Med J. 2008 Aug;25(8):528-33. doi: 10.1136/emj.2007.054338.Emerg Med J. 2008.PMID: 18660411
Zakariassen E, Hunskaar S.Zakariassen E, et al.BMC Emerg Med. 2010 Mar 6;10:5. doi: 10.1186/1471-227X-10-5.BMC Emerg Med. 2010.PMID: 20205933Free PMC article.