1. Homerton University Hospital NHS Foundation Trust, Homerton Row, London, England
2. University College London Queen Square Institute of Neurology, Queen Square, London, England
3. Preventive Neurology Unit, Wolfson Institute of Preventative Medicine, Queen Mary University of London, London, England
4. National Neuroscience Institute, Singapore
5. Singapore General Hospital, Singapore
6. Maastricht University Medical Centre, School for Mental Health and Neuroscience, Alzheimer Centre Limburg, Maastricht, the Netherlands