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.
Olsen A, Tjønneland AM.Olsen A, et al. Among authors: tjonneland am.Ugeskr Laeger. 2021 Apr 5;183(14):V12200929.Ugeskr Laeger. 2021.PMID: 33832554Free article.Danish.