1. Neurobiology; Beijing Institute of Geriatrics; Xuanwu Hospital of Capital Medical University; Beijing China
2. Geriatrics; Beijing Institute of Geriatrics; Xuanwu Hospital of Capital Medical University; Beijing China
3. Parkinson's Disease Center; Beijing Institute for Brain Disorders; Beijing China
4. Key Laboratory on Neurodegenerative Disease; Ministry of Education; Beijing China
5. Beijing Key Laboratory for Parkinson's Disease; Beijing China
6. Evidence-Based Medicine Center; Xuanwu Hospital of Capital Medical University; Beijing China
7. Chinese Center for Disease Control and Prevention; National Center for Chronic and Noncommunicable Disease Control and Prevention; Beijing China
8. Neurology; Beijing Institute of Geriatrics; Xuanwu Hospital of Capital Medical University; Beijing China
9. Beijing Key Laboratory for Parkinson's Disease; Beijing China. Neurology; Beijing Institute of Geriatrics; Xuanwu Hospital of Capital Medical University; Beijing China