1. Department of Neurology and China-America Institute of Neuroscience, Xuanwu Hospital, Capital Medical University, Beijing, China
2. Department of Neurology, Beijing Renhe Hospital, Beijing, China
3. Department of Neurological Surgery, Semmes-Murphey Clinic and University of Tennessee Health Science Center, Memphis, TN, USA
4. Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, USA
5. Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China