- Correspondence to Dr Satoshi Kuwabara, Department of Neurology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan;
- Received December 31, 2012
- Revised February 3, 2013
- Accepted February 6, 2013
- First published March 5, 2013.
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