1. Department of Pathology, Guizhou Medical University Hospital, Guiyang, Guizhou 550004, P.R. China
2. Clinical Research Center, Guizhou Medical University Hospital, Guiyang, Guizhou 550004, P.R. China
3. Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
4. Department of Biochemistry, China Three Gorges University, Yichang, Hubei 443002, P.R. China
5. Center for Clinical Laboratories, Guizhou Medical University Hospital, Guiyang, Guizhou 550004, P.R. China
6. Key Lab of Endemic and Ethnic Diseases of The Ministry of Education of China in Guizhou Medical University, Guiyang, Guizhou 550004, P.R. China