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.
Strope SA, Elliott SP, Smith A, Wei JT, Wilt TJ, Saigal CS; Urologic Diseases in America Project.Strope SA, et al.Urology. 2011 Mar;77(3):535-40. doi: 10.1016/j.urology.2010.07.485. Epub 2011 Jan 21.Urology. 2011.PMID: 21256570Free PMC article.