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Kim TK, Cho W, Youn SM, Chang UK.Kim TK, et al. Among authors: cho w.J Korean Neurosurg Soc. 2016 Nov;59(6):597-603. doi: 10.3340/jkns.2016.59.6.597. Epub 2016 Oct 24.J Korean Neurosurg Soc. 2016.PMID: 27847573Free PMC article.