J Korean Neurosurg Soc. 2014;55(6):337-342.   Published online June 30, 2014
DOI: https://doi.org/10.3340/jkns.2014.55.6.337

J Korean Neurosurg Soc. 2010;47(3):199-202.
DOI: https://doi.org/10.3340/jkns.2010.47.3.199

J Korean Neurosurg Soc. 2009;45(2):122-126.
DOI: https://doi.org/10.3340/jkns.2009.45.2.122

J Korean Neurosurg Soc. 2007;42(5):371-376.
DOI: https://doi.org/10.3340/jkns.2007.42.5.371

J Korean Neurosurg Soc. 2007;42(5):363-366.
DOI: https://doi.org/10.3340/jkns.2007.42.5.363