1. Department of Medicine; University of California; Los Angeles California USA
2. School of Science; Jiangxi University of Science and Technology; Ganzhou China
3. Cardiovascular Research Center, Division of Cardiology, Rhode Island Hospital; Warren Alpert Medical School of Brown University; Providence Rhode Island USA
4. Department of Physics; South China University of Technology; Guangzhou China
5. Department of Biomathematics; University of California; Los Angeles California USA