1. Department of Physiology, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China
2. Experimental Center of Basic Medicine, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China
3. Institute of Physical Education, Southwest University, Chongqing400715, China
4. Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, USA
5. Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China