1. Department of Neurosurgery, The First Hospital of China Medical University , Shenyang, Liaoning , China
2. The First Hospital of China Medical University , Shenyang, Liaoning , China
3. Department of Neurosurgery, The First Affiliated Hospital, Harbin Medical University , Harbin, Heilongjiang , China
4. Department of Neurosurgery, Chinese People’s Liberation Army of China (PLA) General Hospital, Medical School of Chinese PLA, Institute of Neurosurgery of Chinese PLA , Beijing , China