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. 2016 Oct 17;10(5):964–971. doi: 10.4184/asj.2016.10.5.964

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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.

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Table 2. Methodological quality assessment of included studies.