- Satoshi Kuwabara, Department of Neurology, Graduate School of Medicine, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260–8670, Japan;
- Received March 22, 2008
- Revised April 28, 2008
- Accepted April 28, 2008
- First published May 9, 2008.
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