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 Beijing China
5. Department of Neurology Duke University Medical Center Durham NC USA
6. Department of Interventional Neuroradiology Beijing Tiantan Hospital Capital Medical University Beijing China