- Correspondence to: S Omama Department of Neurosurgery, School of Medicine, Iwate Medical University, 19-1 Uchimaru, Morioka, Iwate 020-8505, Japan;
- Received February 17, 2006
- Accepted June 2, 2006
- Revised May 31, 2006
- First published August 17, 2006.
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