1. Victor Horsley Department of Neurosurgery, The National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom.
2. Trauma Audit and Research Network, The University of Manchester, United Kingdom.
3. The Traumatic Brain Injury Centre, Imperial College, St Mary's Hospital, London, United Kingdom.
4. London's Air Ambulance, Queen Mary University, The Royal London Hospital, London, United Kingdom.