Ramez Kirollos is a Consultant Neurosurgeon, Addenbrooke's Hospital, Cambridge, UK.
Adel Helmy is a University Lecturer in Neurosurgery at Addenbrooke's Hospital, Cambridge, UK.
Simon Thomson is a Consultant Neurosurgeon at the Leeds Teaching Hospitals NHS Trust, Leeds, UK.
Peter Hutchinson is a Professor of Neurosurgery at University of Cambridge, UK.