1. Shantou University Medical College, Shantou, China
2. Department of General Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
3. Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
4. The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
5. Department of General Surgery, School of Medicine, Southern China University of Technology, Guangzhou, China