1. Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London,, United Kingdom
2. MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire,, United Kingdom
3. Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK; MRI Unit, National Society for Epilepsy, Chalfont St Peter, Buckinghamshire, SL9 0RJ,, United Kingdom