- Correspondence to Dr Izumi Kawachi, Department of Neurology, Brain Research Institute, Niigata University, 757 Asahimachi 1, Chuo-ku, Niigata 951-8585, Japan;
- Received May 27, 2016
- Revised September 5, 2016
- Accepted September 7, 2016
- First published September 26, 2016.
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