- Correspondence to Professor Ji Hoe Heo, Department of Neurology, Yonsei University College of Medicine, 250 Seongsan-no, Seodaemoon-ku, Seoul 120-752, Korea;
- Received September 22, 2009
- Revised November 20, 2009
- Accepted December 17, 2009
- First published June 19, 2010.
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