Correction to: Spinal Cord advance online publication, 15 April 2008; doi:10.1038/sc.2008.30

Since the publication of the above article, the authors have noticed that the author names were published incorrectly in the above-referenced paper. The correct list of authors is shown below:

Y Tang, HY Shen, L Huang, YF Wu, W Yang, YC Ma, R Yang, J Li and P Wang.

The authors would like to apologize for this error.