1 Department of Medical Oncology, First Affiliated Hospital of Guangxi Medical University No. 6 Shuangyong Road, Nanning 530021, Guangxi Zhuang Autonomous Region, P. R. China.
2 Department of Medical Oncology, Second Affiliated Hospital of Guangxi Medical University No. 166 Daxuedong Road, Nanning 530007, Guangxi Zhuang Autonomous Region, P. R. China.
3 Department of Pathology, First Affiliated Hospital of Guangxi Medical University No. 6 Shuangyong Road, Nanning 530021, Guangxi Zhuang Autonomous Region, P. R. China.