1. Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
2. Department of neurology, China National Clinical Research Center for Neurological Diseases, Beijing, China
3. Center of Stroke, Beijing Institute for Brain Disorders, Beijing, China
4. Department of neurology, Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, China
5. Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, USA
6. Department of Neurosurgery, Munson Medical Center, Traverse City, MI, USA