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.
Pierorazio PM, Ross AE, Lin BM, Epstein JI, Han M, Walsh PC, Partin AW, Pavlovich CP, Schaeffer EM.Pierorazio PM, et al. Among authors: schaeffer em.BJU Int. 2012 Oct;110(8):1122-8. doi: 10.1111/j.1464-410X.2012.10986.x. Epub 2012 Feb 28.BJU Int. 2012.PMID: 22373045Free PMC article.