1. Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
2. China National Clinical Research Center for Neurological Diseases, Beijing, China
3. Center of Stroke, Beijing Institute for Brain Disorders, Beijing, China
4. Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, China
5. Illinois Neurological Institute Stroke Network, Sisters of the Third Order of St Francis Healthcare System, University of Illinois College of Medicine, Peoria
6. Dell Medical School, University of Texas at Austin, Austin