1. Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
2. Beijing Institute for Brain Disorders, Beijing, China
3. Department of Economics, Fordham University, Bronx, NY, USA
4. Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, USA
5. Department of Neurosurgery, University of California San Francisco, San Francisco, CA, USA
6. Department of Neurology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
7. Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China