1. Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, Hubei 443002, P.R. China
2. Department of Pathology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
3. The First People's Hospital of Yichang and The People's Hospital of China Three Gorges University, Yichang, Hubei 443002, P.R. China
4. Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA