1. Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China
2. Department of Neurology, the First Hospital of Tsinghua University, Beijing, China
3. Evidence-Based Medicine Center, Xuanwu Hospital of Capital Medical University, Beijing, China
4. Department of Neurology, Civil Aviation General Hospital, Beijing, China
5. Department of Library, Xuanwu Hospital of Capital Medical University, Beijing, China
6. Center of Alzheimer’s Disease, Beijing Institute for Brain Disorders, Beijing, China
7. National Clinical Research Center for Geriatric Disorders, Beijing, China