1. Department of Neurology of second Affiliated Hospital, Harbin Medical University, Harbin, P. R. China;
2. Biotechnology Experimental Teaching Center, Harbin Medical University, Harbin, P. R. China;
3. Department of Physiology, Harbin Medical University, Harbin, P. R. China;
4. Medical College, Zhejiang University, Hangzhou, P. R. China;
5. School of Medical and Health Sciences, Edith Cowan University, Perth, Australia