1. Department of Gastroenterology, The First Affiliated Hospital Zhejiang University School of Medicine Hangzhou Zhejiang Province China
2. Department of Gastrointestinal Surgery, The First Affiliated Hospital Zhejiang University School of Medicine Hangzhou Zhejiang Province China
3. Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, School of Medicine Zhejiang University Zhejiang Hangzhou China