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.
Zandt-Stastny D, Thorsen MK, Middleton WD, Aiman J, Zion A, McAsey M, Harms L.Zandt-Stastny D, et al. Among authors: middleton wd.AJR Am J Roentgenol. 1989 Jan;152(1):91-5. doi: 10.2214/ajr.152.1.91.AJR Am J Roentgenol. 1989.PMID: 2642364