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Han JH, Lee JM, Koh EJ, Choi HY.Han JH, et al. Among authors: koh ej.J Korean Neurosurg Soc. 2014 Oct;56(4):303-9. doi: 10.3340/jkns.2014.56.4.303. Epub 2014 Oct 31.J Korean Neurosurg Soc. 2014.PMID: 25371779Free PMC article.