1. Sate Key Laboratory of Oncology in South China, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, P.R. China
2. Department of Medical Oncology, Sun Yat-sen University Cancer Center, Guangzhou, P.R. China
3. Department of Medical Oncology, The Second Affiliated Hospital of Kunming Medical University, Kunming, P.R. China
4. Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, P.R. China
5. Department of Gastroenterology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, P.R. China