1. 1Centre for Endocrinology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
2. 2Department of Pathology, STHF, Skien, Norway
3. 3The National Hospital for Neurology and Neurosurgery, UCLH, NHS Trust, London, UK
4. 4Department of Neurosurgery, Charing Cross Hospital, Imperial College, London, UK
5. 5Department of Neurosurgery, Derriford Hospital, Plymouth, UK
6. 6Barts Cancer Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London, UK