J Korean Neurosurg Soc. 2014;55(1):61-63.   Published online January 31, 2014
DOI: https://doi.org/10.3340/jkns.2014.55.1.61

J Korean Neurosurg Soc. 2013;53(3):197-200.   Published online March 31, 2013
DOI: https://doi.org/10.3340/jkns.2013.53.3.197

J Korean Neurosurg Soc. 2010;48(1):85-87.
DOI: https://doi.org/10.3340/jkns.2010.48.1.85

J Korean Neurosurg Soc. 2009;46(4):413-416.
DOI: https://doi.org/10.3340/jkns.2009.46.4.413

J Korean Neurosurg Soc. 1996;25(9):1896-1900.