1. Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou, PR China;
2. Department of Preventive Medicine, Heze Medical College, Heze, PR China;
3. Department of Immunology, Basic Medical College, Huazhong University of Science and Technology, Wuhan, PR China;
4. Cancer Center of the First Hospital of Jilin University, Changchun, PR China;
5. Department of Medical Oncology, Fujian Cancer Hospital, Fujian Medical University Cancer Hospital, Fuzhou, PR China;
6. Department of Gastrointestinal Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, PR China;
7. Department of Surgery, The First Affiliated Hospital of SunYat-sen University, Guangzhou, PR China;
8. Department of Clinical Nutrition, West China Hospital of Sichuan University, Chengdu, PR China;
9. Department of Gastrointestinal Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin, PR China;
10. Department of Nutrition, Daping Hospital & Research Institute of Surgery, Third Military Medical University, Chongqing, PR China;
11. Department of Gastrointestinal Surgery/Clinical Nutrition, Beijing Shijitan Hospital, Capital Medical University, Beijing, PR China