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.
Haldorsen IS, Salvesen HB.Haldorsen IS, et al.Clin Radiol. 2012 Jan;67(1):2-12. doi: 10.1016/j.crad.2011.02.018. Epub 2011 Nov 25.Clin Radiol. 2012.PMID: 22119292Review.