1. Dementia Research Centre, Institute of Neurology, University College London, 8–11 Queen Square, London, UK
2. Centre for Medical Image Computing, Department of Computer Science, University College London, Gower Street, London, UK
3. Department of Human Science, LUMSA University, Via della Traspontina, 21, Rome, Italy
4. Department of Neurology, University Hospital Virgen del Rocio, Seville, Spain
5. Memory and Aging Center, University of California San Francisco, San Francisco, California, USA
6. School of Biomedical Engineering and Imaging Sciences, King's College London, UK