1. Department of Neurosurgery, Yidu Central Hospital of Weifang, Qingzhou, Shandong Province, China;
2. Department of Neurosurgery, Shandong province Weifang Brain Hospital, Weifang, Shandong Province, China;
3. Department of Neurosurgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China