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.
Larose TL, Chen Y, Camargo CA Jr, Langhammer A, Romundstad P, Mai XM.Larose TL, et al. Among authors: langhammer a.J Epidemiol Community Health. 2014 Feb;68(2):165-70. doi: 10.1136/jech-2013-202587. Epub 2013 Nov 6.J Epidemiol Community Health. 2014.PMID: 24197920
Langhammer A, Johnsen R, Holmen J, Gulsvik A, Bjermer L.Langhammer A, et al.J Epidemiol Community Health. 2000 Dec;54(12):917-22. doi: 10.1136/jech.54.12.917.J Epidemiol Community Health. 2000.PMID: 11076988Free PMC article.