1. Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, Am Klopferspitz 18, 82152 Martinsried, Germany.
2. International Center for Spinal Cord Injury, Hugo W. Moser Research Institute at Kennedy Krieger, Department of Neurology, Johns Hopkins University, 707 North Broadway, Suite 523, Baltimore, MD 21205, USA.
3. Department of Neuroscience, Erasmus Medical Center, Post Office Box 2040, 3000 CA Rotterdam, Netherlands.
4. Cell Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, Netherlands.
5. The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 Northwest 14th Terrace, Miami, FL 33136, USA.