1. Dementia Research Centre, Department of Neurodegeneration, UCL Institute of Neurology, London, UK
2. Wellcome Trust Centre for Neuroimaging, UCL Institute of Neurology, London, UK
3. Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London, UK
4. MRC Prion Unit and Department of Neurodegenerative Disease, UCL Institute of Neurology, London, UK
5. Centre for Medical Image Computing, University College London, London, UK
6. Reta Lila Weston Institute and Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK