- Correspondence to Dr Ivo Kwon, Department of Medical Education, School of Medicine, Ewha Woman's University, 911-1, Mok-6-dong, Yangchon-gu, 158-710 Seoul, Korea;
- Received August 3, 2011
- Revised November 15, 2011
- Accepted December 5, 2011
- First published January 17, 2012.
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