1. Memory Aging and Cognition Centre, National University Health System, Singapore, Singapore
2. Department of Pharmacology, National University of Singapore, Singapore, Singapore
3. Departments of Epidemiology and Radiology and Nuclear Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands
4. Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
5. Department of Neurology, National Neuroscience Institute, Singapore, Singapore
6. Raffles Neuroscience Centre, Raffles Hospital, Singapore, Singapore
7. Zhejiang University School of Medicine, Hangzhou, Zhejiang, China