. 2016 Dec 8;10(6):1100–1105. doi: 10.4184/asj.2016.10.6.1100
Copyright © 2016 by Korean Society of Spine Surgery
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.