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 der Wouden EJ, Karrenbeld A, Kleibeuker JH, Dijkstra G.van der Wouden EJ, et al. Among authors: dijkstra g.Neth J Med. 2009 Feb;67(2):41-5.Neth J Med. 2009.PMID: 19299845Free article.Review.