- 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 February 24, 2014
- Revised March 27, 2014
- Accepted March 29, 2014
- First published April 25, 2014.
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