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 den Bemt L, Schermer T, Smeele I, Bischoff E, Jacobs A, Grol R, van Weel C.van den Bemt L, et al.Respir Med. 2008 May;102(5):633-41. doi: 10.1016/j.rmed.2007.12.014. Epub 2008 Jan 31.Respir Med. 2008.PMID: 18242067Free article.Review.
Bischoff EW, Uijen A, van der Wel M.Bischoff EW, et al.BMJ. 2009 Jul 24;339:b2382. doi: 10.1136/bmj.b2382.BMJ. 2009.PMID: 19633032No abstract available.
Bischoff EW, Schermer TR, Bor H, Brown P, van Weel C, van den Bosch WJ.Bischoff EW, et al.Br J Gen Pract. 2009 Dec;59(569):927-33. doi: 10.3399/bjgp09X473079.Br J Gen Pract. 2009.PMID: 19891824Free PMC article.
Bischoff EW, Uijen A, van der Wel M.Bischoff EW, et al.Praxis (Bern 1994). 2010 May 26;99(11):669-70. doi: 10.1024/1661-8157/a000156.Praxis (Bern 1994). 2010.PMID: 20506092German.No abstract available.