1. Department of Medical Nursing, School of Nursing, Zhengzhou University, Zhengzhou, Henan 450051, P.R. China
2. Department of Neurosurgery, The People's Hospital of Hebi, Hebi, Henan 458000, P.R. China
3. Department of Neuroimmunology, The Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450054, P.R. China