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.
Kastl I, Anton-Lamprecht I, Gamborg Nielsen P.Kastl I, et al. Among authors: gamborg nielsen p.Arch Dermatol Res. 1990;282(6):363-70. doi: 10.1007/BF00372085.Arch Dermatol Res. 1990.PMID: 2260881