1. Department of Physiology, Changzhi Medical College, Changzhi, Shanxi 046000, P.R. China
2. Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan 410078, P.R. China
3. Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
4. Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China