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.
de Ruijter W, Westendorp RG, Assendelft WJ, den Elzen WP, de Craen AJ, le Cessie S, Gussekloo J.de Ruijter W, et al. Among authors: de craen aj.BMJ. 2009 Jan 8;338:a3083. doi: 10.1136/bmj.a3083.BMJ. 2009.PMID: 19131384Free PMC article.
Wijsman CA, Maier AB, de Craen AJ, van den Biggelaar AH, Westendorp RG.Wijsman CA, et al. Among authors: de craen aj.J Gerontol A Biol Sci Med Sci. 2011 Apr;66(4):393-9. doi: 10.1093/gerona/glq212. Epub 2010 Dec 22.J Gerontol A Biol Sci Med Sci. 2011.PMID: 21177757