1. Dementia Research Centre Department of Neurodegenerative Disease UCL Queen Square Institute of Neurology London UK
2. Pedestrian Accessibility and Movement Environment Laboratory Department of Civil, Environmental and Geomatic Engineering Faculty of Engineering Science University College London London UK
3. Department of Medical Statistics Faculty of Epidemiology and Population Health London School of Hygiene & Tropical Medicine London UK
4. Centre for Medical Image Computing Department of Computer Science Faculty of Engineering Science University College London London UK