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.
Vetvik K, Straand J.Vetvik K, et al. Among authors: straand j.Tidsskr Nor Laegeforen. 2001 Feb 20;121(5):557-62.Tidsskr Nor Laegeforen. 2001.PMID: 11301609Free article.Norwegian.
Kristoffersen ES, Straand J, Russell MB, Lundqvist C.Kristoffersen ES, et al. Among authors: straand j.BMC Res Notes. 2014 Mar 20;7:165. doi: 10.1186/1756-0500-7-165.BMC Res Notes. 2014.PMID: 24646429Free PMC article.Clinical Trial.