1. Artemisinin Research Center, Guangzhou University of Chinese Medicine, Guangzhou 510006, P. R. China
2. Lingnan Medical Research Center, the first Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510006, P. R. China
3. School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, P. R. China
4. Department of Cardiology, the 2nd Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510006, P. R. China