. 2016 Apr 26;46(3):335–342. doi: 10.4070/kcj.2016.46.3.335
Copyright © 2016 The Korean Society of Cardiology
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.