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.
Bunzel B, Eckersberger F.Bunzel B, et al. Among authors: eckersberger f.Wien Med Wochenschr. 1987 Sep 15;137(17):393-8.Wien Med Wochenschr. 1987.PMID: 3687036German.