. 2019 Mar 30;24(1):20–25. doi: 10.15430/JCP.2019.24.1.20
Copyright © 2019 Korean Society of Cancer Prevention
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.