1. Department of Emergency Surgery, Peking University People’s Hospital, Xicheng, Beijing 100044, China
2. Department of Pancreatic and Gastrointestinal Surgery Division, Ningbo Second Hospital, Ningbo, Zhejiang 315010, China
3. Department of Emergency Medicine, Peking University People’s Hospital, Xicheng, Beijing 100044, China
4. Laboratory of Surgery Oncology, Peking University People’s Hospital, Xicheng, Beijing 100044, China
5. Ningbo Key Laboratory of Intestinal Microecology and Human Major Diseases, Ningbo, Zhejiang 315010, China