A Neligan1, M C Walker2. 1. Homerton University Hospital Foundation Trust, Homerton Row, London E9 6SR, United Kingdom; Department of Neuroscience, Blizard Institute, Queen Mary Univeristy, 4 Newark Street, London E1 2AT, United Kingdom. Electronic address: a.neligan@ucl.ac.uk. 2. Department of Clinical & Experimental Epilepsy, UCL Institute of Neurology, 33 Queen Square, London WC1N 3BG, United Kingdom.