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Shin DW, Sohn MJ, Cho CR, Koo HW, Yoon SW.Shin DW, et al. Among authors: koo hw.J Korean Neurosurg Soc. 2020 Jan;63(1):45-55. doi: 10.3340/jkns.2019.0161. Epub 2019 Dec 30.J Korean Neurosurg Soc. 2020.PMID: 31916426Free PMC article.