. 2000 Dec 31;1(4):185–190. doi: 10.3348/kjr.2000.1.4.185
Copyright © 2000 The Korean Radiological Society
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.