1. Department of Neurosurgery, The First People’s Hospital of Kunshan Affiliated with Jiangsu University, Suzhou, P. R. China
2. Department of Neurosurgery, Affiliated Nanjing Brain Hospital, Nanjing Medical University, Nanjing, P. R. China
3. Department of Neurosurgery, Fourth Affiliated Yancheng Hospital of Nantong University, Yancheng, P. R. China