- Correspondence to Professor Xiangbo Wang, Department of Neurology, Xuanwu Hospital, Capital University of Medical Sciences, Beijing Neurology Consultation Center, 45 Changchun Street, Beijing 100053, PR China;
- Received May 25, 2009
- Revised July 7, 2009
- Accepted July 9, 2009
- First published June 14, 2010.
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