1. Department of Physiology, Zhejiang University, Hangzhou, Zhejiang, P. R. China;
2. Teaching Experiment Center of Biotechnology, Harbin Medical University, Harbin, P. R. China;
3. Department of Physiology, Harbin Medical University, Harbin, P. R. China;
4. Department of Neurology of Second Affiliated Hospital, Harbin Medical University, Harbin, P. R. China