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.
Engeland A, Skurtveit S, Mørland J.Engeland A, et al. Among authors: morland j.Ann Epidemiol. 2007 Aug;17(8):597-602. doi: 10.1016/j.annepidem.2007.03.009. Epub 2007 Jun 18.Ann Epidemiol. 2007.PMID: 17574863
Gustavsen I, Bramness JG, Skurtveit S, Engeland A, Neutel I, Mørland J.Gustavsen I, et al. Among authors: morland j.Sleep Med. 2008 Dec;9(8):818-22. doi: 10.1016/j.sleep.2007.11.011. Epub 2008 Jan 28.Sleep Med. 2008.PMID: 18226959
Gustavsen I, Al-Sammurraie M, Mørland J, Bramness JG.Gustavsen I, et al. Among authors: morland j.Accid Anal Prev. 2009 May;41(3):462-6. doi: 10.1016/j.aap.2009.01.011. Epub 2009 Feb 15.Accid Anal Prev. 2009.PMID: 19393793