. 2007 Oct 31;22(5):795–801. doi: 10.3346/jkms.2007.22.5.795
Copyright © 2007 The Korean Academy of Medical Sciences
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.