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.
Spee LA, Lisman-Van Leeuwen Y, Benninga MA, Bierma-Zeinstra SM, Berger MY.Spee LA, et al.Scand J Prim Health Care. 2013 Dec;31(4):197-202. doi: 10.3109/02813432.2013.844405. Epub 2013 Oct 10.Scand J Prim Health Care. 2013.PMID: 24106821Free PMC article.
Spee LA, Madderom MB, Pijpers M, van Leeuwen Y, Berger MY.Spee LA, et al.Pediatrics. 2010 Mar;125(3):e651-69. doi: 10.1542/peds.2010-0941. Epub 2010 Feb 15.Pediatrics. 2010.PMID: 20156901Review.