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.
Walther MM, Keiser HR, Linehan WM.Walther MM, et al.World J Urol. 1999 Feb;17(1):35-9. doi: 10.1007/s003450050102.World J Urol. 1999.PMID: 10096149Review.