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.
Mortensen E, Sylvest J.Mortensen E, et al. Among authors: sylvest j.Ugeskr Laeger. 1973 Mar 26;135(13):704-5.Ugeskr Laeger. 1973.PMID: 4719915Danish.No abstract available.