. 2019 Jul 1;32(3):147–159. doi: 10.3344/kjp.2019.32.3.147
© The Korean Pain Society, 2019
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.