. 2008 Mar 20;1(1):29–34. doi: 10.3342/ceo.2008.1.1.29
Copyright © 2008 Korean Society of Otorhinolaryngology-Head and Neck Surgery
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.