1. Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University , Changle West Rd. 127, Xincheng District , Xi’an , Shaanxi, 710032 , China
2. Institute of Neurosurgery of People’s Liberation Army of China (PLA), PLA’s Key Laboratory of Critical Care Medicine, Xijing Hospital, Fourth Military Medical University , Xi’an 710032 , China