Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Pancreatic and Gastric Surgical Oncology, Government of the People's Republic of China - State Key Laboratory of Cancer Biology, Chinese Academy of Medical Sciences - National Cancer Center, Government of the People's Republic of China - State Key Laboratory of Cancer Biology, Lanzhou University - Second Hospital, Lanzhou University - First Hospital, Gansu Provincial Cancer Hospital, Chinese Academy of Medical Sciences - National Cancer Center, Chinese Academy of Medical Sciences - National Cancer Center, Gansu Provincial Cancer Hospital, Lanzhou University - The First Clinical Medical School, Lanzhou University - Key Laboratory of Digestive System Tumors of Gansu Province, Government of the People's Republic of China - State Key Laboratory of Cancer Biology, Government of the People's Republic of China - State Key Laboratory of Cancer Biology and Chinese Academy of Medical Sciences - National Cancer Center