1. Division of Neuropathology, National Hospital for Neurology and Neurosurgery; London United Kingdom
2. Department of Clinical and Experimental Epilepsy; UCL Institute of Neurology; London United Kingdom
3. Department of Clinical Neurophysiology; National Hospital for Neurology and Neurosurgery; London United Kingdom
4. The Lysholm Department of Neuroradiology in National Hospital for Neurology and Neurosurgery; London United Kingdom and Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, UK
5. Biological Mass Spectrometry Centre, Institute of Child Health; University College London; London United Kingdom
6. Victor Horsley Department of Neurosurgery; National Hospital for Neurology and Neurosurgery, London, United Kingdom
7. Epilepsy Society, Chesham Lane; Chalfont St Peter United Kingdom