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.
den Uil CA, Caliskan K, Balk AH.den Uil CA, et al. Among authors: balk ah.Ned Tijdschr Geneeskd. 2009;153:A238.Ned Tijdschr Geneeskd. 2009.PMID: 19785886Dutch.
Zijlstra LE, Constantinescu A, Manintveld O, Birim O, Hesselink DA, van Thiel RJ, van Domburg R, Balk AH, Caliskan K.Zijlstra LE, et al. Among authors: balk ah.Ned Tijdschr Geneeskd. 2015;159:A9346.Ned Tijdschr Geneeskd. 2015.PMID: 26648576Dutch.