. 2021 Jun 2;6:100072. doi: 10.1016/j.xnsj.2021.100072
© 2021 The Author(s). Published by Elsevier Ltd on behalf of North American Spine Society.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).