- Correspondence toHideki Sudo, Department of Advanced Medicine for Spine and Spinal Cord Disorders, Hokkaido University Graduate School of Medicine, North-15, West-7, Kita-ku, Sapporo, Hokkaido 060-8638, Japan;
- Accepted 19 November 2009
- Published in print 1 August 2010.
- Published online 3 August 2010.
- Published first 15 June 2010.
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