1. Teaching and Research Division School of Chinese Medicine Hong Kong Baptist University Kowloon, Hong Kong SAR P. R. China
2. Department of Experimental Hematology Beijing Institute of Radiation Medicine Beijing 100850 P. R. China
3. Shenzhen Bay Laboratory Shenzhen 518132 P. R. China
4. Institute of Marine Drugs Guangxi University of Chinese Medicine No. 13 Wuhe Avenue Nan Ning 530200 P. R. China
5. Department of Microbiology and Immunology College of Medicine University of Illinois at Chicago 909 South Wolcott Avenue Chicago, Illinois 60612 USA