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 Montfrans GA, van der Hoeven GM, Karemaker JM, Wieling W, Dunning AJ.van Montfrans GA, et al. Among authors: wieling w.Br Med J (Clin Res Ed). 1987 Aug 8;295(6594):354-5. doi: 10.1136/bmj.295.6594.354.Br Med J (Clin Res Ed). 1987.PMID: 3115445Free PMC article.Clinical Trial.