. 2019 Oct 5;52(5):372–375. doi: 10.5090/kjtcs.2019.52.5.372
Copyright © 2019 by The Korean Society for Thoracic and Cardiovascular Surgery. All rights Reserved.
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.