. 2019 May 8;62(6):643–648. doi: 10.3340/jkns.2018.0152
Copyright © 2019 The Korean Neurosurgical Society
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Fig. 1.
Flow chart showing exclusion criteria of study population.