1. Department of Neurology Beijing Tiantan Hospital Capital Medical University BeijingChina
2. China National Clinical Research Center for Neurological Diseases BeijingChina
3. Center of Stroke Beijing Institute for Brain Disorders BeijingChina
4. Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease BeijingChina
5. Department of Epidemiology and Health Statistics School of Public Health Capital Medical University BeijingChina
6. Beijing Municipal Key Laboratory of Clinical Epidemiology Beijing China