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.
DeVries A, Munzenrider JE, Hedley-Whyte T, Hug EB.DeVries A, et al.Strahlenther Onkol. 1999 Feb;175(2):62-7. doi: 10.1007/BF02753844.Strahlenther Onkol. 1999.PMID: 10065140German.