1. College of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
2. Institute of Medical Biology, Chinese Academy of Medical Sciences, Peking Union Medical College, Kunming, Yunnan 650000, P. R. China
3. School of Basic Medical Sciences, Kunming Medical University, Kunming 650500, P. R. China
4. Department of Pathology and Pathophysiology, Medical College, Yunnan University, Kunming 650091, P. R. China