1. John van Geest Centre for Brain Repair, Department of Clinical Neurosciences; University of Cambridge; Cambridge CB2 0PY U.K.
2. Laboratory for Regeneration of Sensorimotor Systems; Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences (KNAW); 1105 BA Amsterdam The Netherlands
3. Biological Sciences; University of Southampton; Southampton SO17 1BJ U.K.
4. Centre for Neurogenomics and Cognitive Research, Amsterdam Neuroscience; Vrije Universiteit Amsterdam; 1081 HV Amsterdam The Netherlands
5. Centre of Reconstructive Neuroscience; Institute of Experimental Medicine; 142 20 Prague 4 Czech Republic