- Correspondence to Dr Byung-Ok Choi, Department of Neurology, Ewha Womans University, School of Medicine, Mokdong Hospital, 911-1 Mokdong, Yangcheon-ku, Seoul 158-710, Korea;
- Received April 27, 2009
- Revised June 28, 2009
- Accepted July 9, 2009
- First published June 28, 2010.
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