J Korean Neurosurg Soc. 2013;53(2):72-76.   Published online February 28, 2013
DOI: https://doi.org/10.3340/jkns.2013.53.2.72

J Korean Neurosurg Soc. 2011;50(5):403-408.
DOI: https://doi.org/10.3340/jkns.2011.50.5.403

J Korean Neurosurg Soc. 2011;50(4):392-395.
DOI: https://doi.org/10.3340/jkns.2011.50.4.392

J Korean Neurosurg Soc. 2005;38(3):206-210.

J Korean Neurosurg Soc. 2003;33(5):495-500.

J Korean Neurosurg Soc. 1989;18(5):784-789.