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.
Baillie M, Mok PM.Baillie M, et al. Among authors: mok pm.Australas Radiol. 2004 Sep;48(3):288-95. doi: 10.1111/j.0004-8461.2004.01309.x.Australas Radiol. 2004.PMID: 15344975