1. Division of Psychiatry, University College London, London, UK;
2. National Clinical Research Center for Mental Disorders & Key Laboratory of Mental Health, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China;
3. Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China;
4. Centre for Research for Ageing and Cognitive Health, University of Exeter, Exeter, UK