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.
Helle C, Sommer AK, Syversen PV, Lauritzen F.Helle C, et al. Among authors: lauritzen f.Tidsskr Nor Laegeforen. 2019 Feb 25;139(4). doi: 10.4045/tidsskr.18.0502. Print 2019 Feb 26.Tidsskr Nor Laegeforen. 2019.PMID: 30808106Free article.English, Norwegian.