J Korean Neurosurg Soc. 2014;56(3):265-268.   Published online September 30, 2014
DOI: https://doi.org/10.3340/jkns.2014.56.3.265

J Korean Neurosurg Soc. 2013;54(3):246-249.   Published online September 30, 2013
DOI: https://doi.org/10.3340/jkns.2013.54.3.246

J Korean Neurosurg Soc. 2009;46(1):77-80.
DOI: https://doi.org/10.3340/jkns.2009.46.1.77

J Korean Neurosurg Soc. 2006;39(1):64-67.

J Korean Neurosurg Soc. 2005;37(3):232-234.

J Korean Neurosurg Soc. 2001;30(12):1439-1442.