1. MRC Prion Unit and
2. Department of Cellular and Molecular Medicine, The Panum Institute, University of Copenhagen, Copenhagen, Denmark,
3. Memory Disorders Research Unit, Department of Neurology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark,
4. Department of Pathology, Randers Hospital, Randers, Denmark,
5. Laboratory for Experimental Neuropathology, Danish Neuroscience Center, Aarhus University Hospital, Aarhus, Denmark,
6. Department of Neurology, Addenbrooke's Hospital, Cambridge, UK,
7. Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK,
8. Department of Molecular Genetics, Neurodegenerative Brain Diseases Group, VIB, Antwerpen, Belgium,
9. Laboratory of Neurogenetics, Institute Born-Bunge, and University of Antwerp, Antwerpen, Belgium,
10. Department of Neurology, AZ Zusters van Barmhartigheid, Ronse, Belgium and
11. Department of Cell Biology, UCL Institute of Ophthalmology, Bath Street, London, UK