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.
Rise IR, Kirkeby OJ.Rise IR, et al. Among authors: kirkeby oj.J Neurosurg. 1998 Sep;89(3):448-53. doi: 10.3171/jns.1998.89.3.0448.J Neurosurg. 1998.PMID: 9724120
Rise IR, Kirkeby OJ.Rise IR, et al. Among authors: kirkeby oj.J Neurosurg. 1998 Sep;89(3):454-9. doi: 10.3171/jns.1998.89.3.0454.J Neurosurg. 1998.PMID: 9724121