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.
van Brussel BL, Plokker HW, van den Bergh EJ, Ernst JM, Knaepen PJ, Vermeulen FE.van Brussel BL, et al. Among authors: plokker hw.Ned Tijdschr Geneeskd. 1992 Oct 17;136(42):2072-7.Ned Tijdschr Geneeskd. 1992.PMID: 1407209Dutch.