1. Department of Gastrointestinal Neoplasms Surgery, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, People’s Republic of China
2. Department of Medical Oncology, First Affiliated Hospital of Nanchang University, Nanchang, People’s Republic of China
3. Department of Gastrointestinal Surgery, Huadu District People’s Hospital, Southern Medical University, Guangzhou, People’s Republic of China
4. Department of Oncology, Guangzhou Hospital of Integrated Traditional and West Medicine, Guangzhou, People’s Republic of China
5. General Surgery, The First Hospital of Yulin, Yulin, People’s Republic of China
6. Department of Oncology, Dongguan People's Hospital, Dongguan, People’s Republic of China
7. State Key Laboratory of Cancer Biology, Department of Digestive Surgery, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an, People’s Republic of China