Department of Neurosurgery, Hull Royal Infirmary, Anlaby Road, Hull, HU3 2JZ, UK Adam Razak & Masood Hussain Department of Neurological Surgery, John Radcliff Hospital, Headley Way, Headington, Oxford, OX3 9DU, UK Rory Piper & Jash Patel Department of Neurosurgery, Royal Sussex County Hospital...