- Correspondence to Dr Satoshi Kuwabara, Department of Neurology, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan;
- Received May 13, 2017
- Revised June 14, 2017
- Accepted June 19, 2017
- First published August 2, 2017.
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