- Correspondence to Dr S Kuwabara, Department of Neurology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan;
- Received September 18, 2011
- Revised October 12, 2011
- Accepted October 14, 2011
- First published November 19, 2011.
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