1 Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, Queen Square, London, WC1N 3BG, UK. eleanor.moncur@gmail.com.
2 Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, Queen Square, London, WC1N 3BG, UK.
3 Department of Neuropathology, Institute of Neurology, Queen Square, London, WC1N 3BG, UK.
4 Department of Neurosurgery, Cambridge University Hospitals, Hills Road, Cambridge, CB2 0QQ, UK.