- Correspondence to Professor Ji Hoe Heo, Department of Neurology, Yonsei University College of Medicine, 250 Seongsan-no, Seodaemoon-ku, Seoul 120-752, Korea;
- Received 22 September 2009
- Revised 20 November 2009
- Accepted 17 December 2009
- Published in print 1 August 2010.
- Published online 3 August 2010.
- Published first 19 June 2010.
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