1. Department of Gastrointestinal Surgery/Clinical Nutrition, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China
2. Beijing International Science and Technology Cooperation Base for Cancer Metabolism and Nutrition, Beijing 100038, China
3. Key Laboratory of Cancer FSMP for State Market Regulation, Beijing 100038, China
4. Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste 28069, Italy.