1. National Prion Clinic, National Hospital for Neurology and Neurosurgery, Queen Square, London, England2Medical Research Council Prion Unit, Department of Neurodegenerative Disease, University College London Institute of Neurology, Queen Square, London, En
2. Medical Research Council Prion Unit, Department of Neurodegenerative Disease, University College London Institute of Neurology, Queen Square, London, England
3. National Prion Clinic, National Hospital for Neurology and Neurosurgery, Queen Square, London, England
4. The Walton Centre NHS Foundation Trust, Fazakerley, Liverpool, England
5. Division of Neuropathology, Department of Neurodegenerative Disease, University College London Institute of Neurology, Queen Square, London, England