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DOI: https://doi.org/10.3340/jkns.2011.50.6.520

J Korean Neurosurg Soc. 2010;48(4):363-366.
DOI: https://doi.org/10.3340/jkns.2010.48.4.363

J Korean Neurosurg Soc. 2001;30(2):231-238.