1. Research Department, Royal Hospital for Neuro-disability, London, UK;
2. Department of Brain Repair and Rehabilitation, Institute of Neurology, University College London, London, UK;
3. Neurophysiology Department, Cromwell Hospital, London, UK;
4. Department of Neurology, National Hospital for Neurology and Neurosurgery, London, UK;
5. Institute of Cognitive Neuroscience, University College London, London, UK