. 2015 Oct 14;48(2):458–464. doi: 10.4143/crt.2015.135
Copyright © 2016 by the Korean Cancer Association
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.