1. Department of Neurosurgery; Academic Division of Neurosurgery, Department of Clinical Neurosciences; Box 167 Addenbrookes Hospital Cambridge UK CB2 0QQ
2. University of Exeter Medical School, University of Exeter; European Centre for Environment and Human Health; Knowledge Spa RCH Truro UK TR1 3HD
3. National Institute for Health and Clinical Excellence; Centre for Clinical Practice; Level 1A, City Tower Piccadilly Plaza Manchester UK M1 4BT
4. University of Exeter Medical School, University of Exeter; Peninsula Technology Assessment Group (PenTAG); Salmon Pool Lane Exeter UK EX2 4SG
5. Western General Hospital; Edinburgh Centre for Neuro-Oncology (ECNO); Crewe Road Edinburgh Scotland UK EH4 2XU