1. Cancer Research Institute, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
2. Department of Pathology, The First Affiliated Hospital, Sun Yat‑Sen University, Guangzhou, Guangdong 510080, P.R. China
3. Department of Oncology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510280, P.R. China