J Korean Neurosurg Soc. 2012;52(2):80-84.   Published online August 31, 2012
DOI: https://doi.org/10.3340/jkns.2012.52.2.80

J Korean Neurosurg Soc. 2004;35(2):173-177.

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J Korean Neurosurg Soc. 2002;32(5):448-452.

J Korean Neurosurg Soc. 2002;31(4):369-372.