1. Department of Neurology, Xuan Wu Hospital Capital Medical University Beijing China
2. Beijing Key Laboratory of Geriatric Cognitive Disorders Beijing China
3. Center of Alzheimer's Disease Beijing Institute for Brain Disorders Beijing China
4. Key Laboratory of Neurodegenerative Diseases, Ministry of Education Beijing China
5. National Clinical Research Center for Geriatric Disorders Beijing China
6. Department of Neurology, Shandong Provincial Hospital Shandong University Jinan China
7. Department of Neurology Henan Provincial People's Hospital Zhengzhou China
8. Department of Neurology Zhongnan Hospital of Wuhan University Wuhan China
9. Department of Neurology The First Teaching Hospital of Jilin University Changchun China
10. Dementia Unit Beijing Geriatric Hospital Beijing China
11. Department of Geriatrics The First Affiliated Hospital of Chongqing Medical University Chongqing China
12. Department of Neurology Affiliated Foshan Hospital of Sun Yat‐sen University Foshan China
13. Department of Neurology Tianjin Huanhu Hospital Tianjin China
14. Department of Gerontology, Fuxing Hospital Capital Medical University Beijing China
15. Department of Psychiatry Zhejiang Provincial People's Hospital Hangzhou China
16. Department of Neurology The First Affiliated Hospital of Zhejiang University Hangzhou China
17. Department of Neurology, Daping Hospital Third Military Medical University Chongqing China
18. Department of Neurology Daqing Oilfield General Hospital Daqing China
19. Department of Neurology The First Affiliated Hospital of Xi'an Jiaotong University Xi'an China
20. Department of Neurology and Institute of Neurology Huashan Hospital Fudan University Shanghai China
21. Department of Neurology Baotou Central Hospital Baotou China
22. Department of Neurology The 88th Hospital of PLA Taian China
23. Department of Neurology, Qingdao Municipal Hospital, School of Medicine Qingdao University Qingdao China
24. Department of Neurology Xiangya Hospital Central South University Changsha China
25. Department of Neurology People's Hospital of Jiangxi Province Nanchang China
26. Department of Neurology Weihai Municipal Hospital Weihai China
27. Department of Neurology, Center for Geriatric Medicine China‐Japan Friendship Hospital Beijing China
28. Department of Geriatric Psychiatric Guangzhou Huiai Hospital Guangzhou China
29. Department of Neurology Hebei General Hospital Shijiazhuang China
30. Department of Neurology Beijing Rehabilitation Hospital Affiliated to Capital Medical University Beijing China
31. Department of Neurology The Affiliated Hospital of Guizhou Medical University Guiyang China
32. Department of Neurology Henry Ford Hospital Detroit MI USA
33. McGill Centre for Studies in Aging McGill University Montreal Canada