1. State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer Center Guangzhou Guangdong 510060 P. R. China
2. Department of Medical OncologySun Yat‐sen University Cancer Center Guangzhou Guangdong 510060 P. R. China
3. Department of PathologySun Yat‐sen University Cancer Center Guangzhou Guangdong 510060 P. R. China
4. Department of HematologySun Yat‐sen University Cancer Center Guangzhou Guangdong 510060 P. R. China