. 2011 Apr 26;47(1):31–38. doi: 10.4068/cmj.2011.47.1.31
© Chonnam Medical Journal, 2011
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.