. 2019 Mar 5;31(1):4–10. doi: 10.5371/hp.2019.31.1.4
Copyright © 2019 by Korean Hip 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.