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.
Siepman Van den Berg MFR, Grant M, van Erp N, van Gils CH, Muris J, Brandenbarg D, van Asselt KM, de Wit NJ, Helsper CW; COVID and Cancer‐NL Consortium.Siepman Van den Berg MFR, et al. Among authors: de wit nj.J Gen Fam Med. 2022 Dec 14;24(2):131-4. doi: 10.1002/jgf2.597. Online ahead of print.J Gen Fam Med. 2022.PMID: 36718286Free PMC article.
Fransen GA, van Marrewijk CJ, Mujakovic S, Muris JW, Laheij RJ, Numans ME, de Wit NJ, Samsom M, Jansen JB, Knottnerus JA.Fransen GA, et al. Among authors: de wit nj.BMC Med Res Methodol. 2007 Apr 23;7:16. doi: 10.1186/1471-2288-7-16.BMC Med Res Methodol. 2007.PMID: 17451599Free PMC article.Review.