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.
Paek KI, Kim SH, Song SH, Choi SW, Koh HS, Youm JY, Kim Y.Paek KI, et al. Among authors: choi sw.J Korean Med Sci. 2005 Jun;20(3):489-94. doi: 10.3346/jkms.2005.20.3.489.J Korean Med Sci. 2005.PMID: 15953875Free PMC article.
Lee GC, Choi SW, Kim SH, Kwon HJ.Lee GC, et al. Among authors: choi sw.J Korean Neurosurg Soc. 2009 Feb;45(2):107-11. doi: 10.3340/jkns.2009.45.2.107. Epub 2009 Feb 28.J Korean Neurosurg Soc. 2009.PMID: 19274122Free PMC article.