- Dr Satoshi Kuwabara, Department of Neurology, Chiba University School of Medicine, 1–8–1 Inohana, Chuo-ku, Chiba 260–0867, Japan email
- Received January 25, 1999
- Revised August 31, 1999
- Accepted September 7, 1999
- First published February 1, 2000.
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