1. Department of Pathology, Hengxian People's Hospital, Nanning, Guangxi Zhuang Autonomous Region 530300, P.R. China
2. Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
3. Department of Radiotherapy, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China