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.
Armonda RA, Vo AH, Dunford J, Bell RS.Armonda RA, et al. Among authors: bell rs.Neurosurgery. 2006 Nov;59(5 Suppl 3):S66-76; discussion S3-13. doi: 10.1227/01.NEU.0000237337.38375.90.Neurosurgery. 2006.PMID: 17053620Review.
Bell R, Severson MA 3rd, Armonda RA.Bell R, et al.Neurosurg Clin N Am. 2009 Jul;20(3):265-78. doi: 10.1016/j.nec.2009.04.012.Neurosurg Clin N Am. 2009.PMID: 19778699Review.