[1] UCL, Stroke Res Ctr, Dept Brain Repair & Rehabil, Queen Sq Inst Neurol, Russell Sq House,10-12 Russell Sq, London WC1B 5EH, England
[2] Natl Hosp Neurol & Neurosurg, London, England
[3] Natl Hosp Neurol & Neurosurg, Lysholm Dept Neuroradiol, London, England
[4] UCL, Dept Mol Neurosci, Queen Sq Inst Neurol, London, England
[5] Natl Hosp Neurol & Neurosurg, Div Neuropathol, London, England
[6] Cardiff Univ, Dept Pathol, Cardiff, S Glam, Wales
[7] Queen Mary Univ London, Barts & London Sch Med & Dent, London, England
[8] Royal London Hosp, London, England
[9] Abertawe Bro Morgannwg Univ Hlth Board, Morriston Hosp, Swansea, W Glam, Wales
[10] UCL, Med Res Council Prion Unit, Inst Prion Dis, London, England
[11] Natl Hosp Neurol & Neurosurg, Natl Prion Clin, London, England
[12] UCL, Dept Neurodegenerat Dis, Queen Sq Inst Neurol, London, England