1. Graduate School, Tianjin Medical University, Tianjin 300070, P.R. China
2. Department of Neurosurgery, Logistics University of Chinese People's Armed Police Force, Tianjin 300162, P.R. China
3. Key Laboratory of Disaster and Emergency Rescue Medicine in People's Liberation Army, Logistics University of Chinese People's Armed Police Force, Tianjin 300162, P.R. China
4. Department of Cell Biology, Logistics University of Chinese People's Armed Police Forces, Tianjin 300309, P.R. China