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. Department of Neurology, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
6. Neurovascular Division, Department of Neurology, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ 85013, USA