Correction to: Spinal Cord advance online publication, 10 March 2015; doi:10.1038/sc.2015.35

Since the publication of this article, the authors have noticed an error in author affiliation 5. The correct affiliation is:

Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran.

The spelling of the author's name ‘H Sabour’ has also been corrected.

The html and online PDF versions have been amended.

The authors apologize for any inconvenience caused.