- Correspondence to: Dr Ryuji Sakakibara Neurology Department, Chiba University, 1–8–1 Inohana Chuo-ku, Chiba 260–8670, Japan;
- Received May 2, 2004
- Accepted June 25, 2004
- Revised June 15, 2004
- First published February 16, 2005.
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