1. Department of General Practice, XuanWu Hospital of Capital Medical University, Beijing, China
2. Department of General Surgery, XuanWu Hospital of Capital Medical University, Beijing, China
3. Radiological Sciences, Division of Clinical Neuroscience, Queen’s Medical Centre, University of Nottingham, Nottingham, UK
4. Department of Neurology, XuanWu Hospital of Capital Medical University, Beijing, China
5. National Clinical Research Center for Geriatric Disorders, Beijing, China
6. Center of Alzheimer’s Disease, Beijing Institute for Brain Disorders, Beijing, China