Chunlei Hu1, Qi Zhang1, Hanping Shi2,3,4. 1. Department of Gastrointestinal Surgery, Department of Clinical Nutrition, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China. 2. Department of Gastrointestinal Surgery, Department of Clinical Nutrition, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China. shihp@ccmu.edu.cn. 3. Department of Oncology, Capital Medical University, Beijing, 100038, China. shihp@ccmu.edu.cn. 4. Beijing International Science and Technology Cooperation Base for Cancer Metabolism and Nutrition, Beijing, 100038, China. shihp@ccmu.edu.cn.