1. Department of Stomatology, School of Stomatology, Guizhou Medical University, 4 Beijing Road, Guiyang 550004, Guizhou Province, P.R. China
2. Department of Pathology, School of Clinical Medicine, Guizhou Medical University, 4 Beijing Road, Guiyang 550004, Guizhou Province, P.R. China
3. Department of Pathology, The Affiliated Hospital of Guizhou Medical University, 4 Beijing Road, Guiyang 550004, Guizhou Province, P.R. China
4. Key Lab of Endemic and Ethnic Diseases of the Ministry of Education of China in Guizhou Medical University, Guiyang 550004, Guizhou Province P. R. China
5. Key Lab of Endemic and Ethnic Diseases of the Ministry of Education of China in Guizhou Medical University, Guiyang 550004, Guizhou Province, P. R. China
6. Center for Clinical Laboratories, Guizhou Medical University Hospital, 4 Beijing Rd, Guiyang 550004, Guizhou Province, P.R. China
7. Forensic Science Section, School of Basic Medical Sciences, Guizhou University of Traditional Chinese Medicine, Dong-Qing-Nan Road, Guiyang 550025, Guizhou Province, P.R. China
8. Department of Medicine, Hennepin County Medical Center, 730 South 8th St., Minneapolis, MN 55415