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.
Ten Harkel AD, Van Osch-Gevers M, Helbing WA.Ten Harkel AD, et al. Among authors: helbing wa.J Am Soc Echocardiogr. 2009 Aug;22(8):933-8. doi: 10.1016/j.echo.2009.04.024. Epub 2009 Jun 7.J Am Soc Echocardiogr. 2009.PMID: 19505791
de Koning WB, van Osch-Gevers M, Ten Harkel AD, van Domburg RT, Spijkerboer AW, Utens EM, Bogers AJ, Helbing WA.de Koning WB, et al. Among authors: helbing wa.Eur J Pediatr. 2008 Sep;167(9):995-1004. doi: 10.1007/s00431-007-0626-5. Epub 2007 Nov 7.Eur J Pediatr. 2008.PMID: 17987315
Ten Harkel AD, Berkhout M, Hop WC, Witsenburg M, Helbing WA.Ten Harkel AD, et al. Among authors: helbing wa.Arch Dis Child. 2009 Jul;94(7):531-5. doi: 10.1136/adc.2007.134924. Epub 2009 Mar 22.Arch Dis Child. 2009.PMID: 19307195
van der Zwaan HB, Helbing WA, McGhie JS, Geleijnse ML, Luijnenburg SE, Roos-Hesselink JW, Meijboom FJ.van der Zwaan HB, et al. Among authors: helbing wa.J Am Soc Echocardiogr. 2010 Feb;23(2):134-40. doi: 10.1016/j.echo.2009.12.001.J Am Soc Echocardiogr. 2010.PMID: 20152693