Q. Xuan1, F. K. Bao1, H. M. Pan2 and A. H. Liu3*
1Department of Microbiology and Immunology, Kunming Medical University, P.O. Box 650500 Kunming, China.
2Health Institute of Kunming Medical University, P. O. Box 650500 Kunming, China.
3Department of Biochemistry, Kunming Medical University, P. O. Box 650500 Kunming, China.
