1. Institute of Pathogenic Biology and Key Laboratory of Special Pathogen Prevention and Control of Hunan Province, University of South China, Hengyang, Hunan 421001, P.R. China
2. Department of Clinical Laboratory, Hengyang No. 1 People's Hospital, Hengyang, Hunan 421001, P.R. China
3. Department of Clinical Laboratory, The Second Hospital Affiliated to University of South China, Hengyang, Hunan 421001, P.R. China
4. Department of Clinical Laboratory, The First Hospital Affiliated to University of South China, Hengyang, Hunan 421001, P.R. China
5. Department of Laboratory Animals, University of South China, Hengyang, Hunan 421001, P.R. China