- Correspondence to: Dr A Tsunoda, Department of Neurosurgery, Koshigaya Municipal Hospital, 10-47-1 Higashikoshigaya, Koshigaya City, Saitama 343-0023, Japan;
- Received July 11, 2001
- Accepted July 12, 2002
- Revised June 6, 2002
- First published November 1, 2002.
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