. 2021 Feb 2;22(6):931–943. doi: 10.3348/kjr.2020.0675
Copyright © 2021 The Korean Society of Radiology
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.