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.
Williams AM, Simon I, Landis PK, Moser C, Christens-Barry W, Carter HB, Metter EJ, Partin AW.Williams AM, et al. Among authors: landis pk.J Androl. 1999 Jul-Aug;20(4):474-80.J Androl. 1999.PMID: 10452590Free article.