1. Central Laboratory, Xuanwu Hospital, Capital Medical University, Key Laboratory for Neurodegenerative Disease of the Ministry of Education, Beijing, China
2. Department of Neurology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
3. Department of Internal Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
4. Center of Alzheimer’s Disease, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
5. Beijing Geriatric Medical Research Center, Beijing, China