1. Centre for Neuroregeneration, University of Edinburgh, 49 Little France Crescent, Edinburgh EH16 4SB, UK.
2. Centre for Multiple Sclerosis Research, University of Edinburgh, 47-49 Little France Crescent, Edinburgh EH16 4SB, UK.
3. MRC Centre for Regenerative Medicine, University of Edinburgh, 47-49 Little France Crescent, Edinburgh EH16 4SB, UK.