1. Key Laboratory of Endemic and Ethnic Diseases, Guizhou Medical University, Ministry of Education, Guiyang 550004, P.R. China
2. Key Laboratory of Medical Molecular Biology, Guizhou Medical University, Guiyang 550004, P.R. China
3. School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550004, P.R. China
4. Department of Neurosurgery, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, P.R. China
5. Department of Pathology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, P. R. China