1. Department of Histology and Embryology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
2. Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
3. Department of Pathology and Physiopathology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
4. Evidence Identification Center, The Seven Star Branch in The Guilin City Public Security Bureau, Guilin, Guangxi 541004, P.R. China