1. Clinical Laboratory and Medical Research Center, Zhuhai Hospital of Jinan University, Zhuhai People's Hospital, Zhuhai, P.R. China
2. Clinical Laboratory, Xiangya Hospital of Central South University, Changsha, P.R. China
3. Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, P.R. China
4. Hormel Institute, University of Minnesota, Austin, Minnesota, USA