1. Department of Neurosurgery, Medical School of Nanjing University, Affiliated Jinling Hospital, Nanjing, Jiangsu Province, China
2. Medical School of Southeast University, Nanjing, Jiangsu Province, China
3. Department of Neurosurgery, Baylor Scott and White Medical Center, Temple, Texas, United States
4. Medical School of Southern Medical University, Guangzhou, Guangdong Province, China