1. The Clinical College of Jining Medical University, Ji-Ning City, Shandong Province, People's Republic of China
2. Deparment of Neurosurgery, Daping Hospital, Army Medical University, Chongqing, People's Republic of China
3. Department of Neurosurgery, Ji Ning No.1 People's Hospital, Ji-Ning City, Shandong, Shandong Province, People's Republic of China
4. Department of Neurosurgery, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, Shanghai, People's Republic of China