- Correspondence to Dr R Thornton, UCL, Institute of Neurology, MRI Unit, National Society for Epilepsy, Chesham Lane, Chalfont St Peter, Buckinghamshire SL9 0RJ, UK;
- Received 1 October 2009
- Revised 17 December 2009
- Accepted 24 December 2009
- Published online 3 August 2010.
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