J Korean Neurosurg Soc. 2013;54(1):30-33.   Published online July 31, 2013
DOI: https://doi.org/10.3340/jkns.2013.54.1.30

J Korean Neurosurg Soc. 2008;43(2):109-110.
DOI: https://doi.org/10.3340/jkns.2008.43.2.109

J Korean Neurosurg Soc. 2006;40(4):267-272.

J Korean Neurosurg Soc. 2005;38(6):481-483.