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.
Souwer ET, Blaauw J, Coffeng SM, Smit AJ, Van Doormaal JJ, Faas MM, Van Pampus MG.Souwer ET, et al. Among authors: blaauw j.Acta Obstet Gynecol Scand. 2011 Jul;90(7):797-801. doi: 10.1111/j.1600-0412.2011.01128.x. Epub 2011 May 20.Acta Obstet Gynecol Scand. 2011.PMID: 21418159Free article.
Kunnen A, Blaauw J, van Doormaal JJ, van Pampus MG, van der Schans CP, Aarnoudse JG, van Winkelhoff AJ, Abbas F.Kunnen A, et al. Among authors: blaauw j.J Clin Periodontol. 2007 Mar;34(3):202-7. doi: 10.1111/j.1600-051X.2006.01036.x.J Clin Periodontol. 2007.PMID: 17309594