1. Cancer Research Institute; College of Medicine; University of South China; Chang Sheng Xi Avenue 28 Hengyang Hunan 421001 P.R. China
2. Shanghai Center for Bioinformation Technology (SCBIT); Shanghai Academy of Science and Technology; Shanghai 201203 P.R. China
3. Hunan Provincial Key Laboratory for Special Pathogen Prevention and Control; University of South China; Hunan 421001 P.R. China