- Correspondence to Professor T Yokota, Department of Neurology and Neurological Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-819, Japan;
- Received November 10, 2011
- Revised March 19, 2012
- Accepted March 20, 2012
- First published April 27, 2012.
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