1. Institute of Pathogenic Biology, Hengyang Medical School, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, P. R. China
2. College of Medical Technology, Hunan Polytechnic of Environment and Biology, Hengyang, P. R. China
3. The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, P. R. China