Capital Medical University - Department of Gastrointestinal Surgery, Capital Medical University - Department of Gastrointestinal Surgery, Wuhan University - Cancer Center, Capital Medical University - Department of Gastrointestinal Surgery, Capital Medical University - Department of Gastrointestinal Surgery, Fujian Medical University - Department of Medical Oncology, Government of the People's Republic of China - Daping Hospital, Department of Clinical Nutrition, Zhengzhou University - Department of Epidemiology, San Raffaele Hospital - Department of Surgery, Uppsala University - Department of Public Health and Caring Sciences, Jilin University (JLU) - Key Laboratory of Organ Regeneration & Transplantation of the Ministry of Education, University of Trieste - Department of Medicine, Surgery and Health sciences and Capital Medical University - Department of Gastrointestinal Surgery