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.
Calder A, Owens CM.Calder A, et al. Among authors: owens cm.Pediatr Radiol. 2009 Jun;39(6):527-37. doi: 10.1007/s00247-008-1133-1. Epub 2009 Feb 6.Pediatr Radiol. 2009.PMID: 19198826Review.