- Correspondence to Professor Seung-Chyul Hong, Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul 135-710, Korea;
- Received December 8, 2008
- Revised April 25, 2009
- Accepted June 5, 2009
- First published September 2, 2009.
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