1. Department of Gastroenterology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
2. Institution of Gastroenterology, Zhejiang University, Hangzhou, Zhejiang Province, China
3. Department of Oncology, Zhejiang University Jinhua Hospital, Jinhua, Zhejiang Province, China
4. Department of Endocrinology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
5. Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, Zhejiang Province, China
6. Gastrointestinal Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA