1. Department of Geriatrics, Xuanwu Hospital Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, China
2. Central Laboratory, Xuanwu Hospital Capital Medical University, Key Laboratory for Neurodegenerative Disease of Ministry of Education, Center of Alzheimer’s Disease, Beijing Institute for Brain Disorders, Beijing, China
3. Department of Geriatrics, Beijing Geriatric Hospital, Beijing, China