1. National Prion Clinic, National Hospital for Neurology and Neurosurgery, University College London Hospitals NHS Foundation Trust (UCLH), London, UK
2. MRC Prion Unit at UCL, Institute of Prion Diseases, 33 Cleveland St. London, UK
3. Division of Neuropathology, National Hospital for Neurology and Neurosurgery, University College London NHS Foundation Trust, Queen Square, London, UK
4. University College London NHS Foundation Trust, Queen Square, London, UK
5. Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, London, UK