1. Department of Neurology, Beijing Luhe Hospital, Capital Medical University, Beijing, China
2. Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, USA
3. Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
4. China-America Institute of Neuroscience, Beijing Luhe Hospital, Capital Medical University, Beijing, China
5. Department of Neurosurgery, Gates Vascular Institute at Kaleida Health, Buffalo, NY, USA