- Correspondence to Dr Satoshi Kuwabara, Department of Neurology, Chiba University Hospital, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan;
- Received 13 May 2017
- Revised 14 June 2017
- Accepted 19 June 2017
- Published in print 1 October 2017.
- Published online 11 September 2017.
- Published first 2 August 2017.
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