Correction to: Spinal Cord advance online publication 11 April 2017; https://doi.org/10.1038/sc.2017.31.

Since publication of this paper, the authors have become aware of two minor errors in the labelling of Figures 4 and 5. They are:

1. Figure 4: the title of column 2 is incorrect. It should read “Robotic” (not BWSTT).

2. Figure 5: the titles of columns 2 and 3 are the wrong way around. So column 2 should be “Robotic” (not “Overground“) and column 3 should read “Overground” (not “Robotic”).

The authors apologise for these errors and any inconvenience caused.