1. The Second Clinical Medical College Zhejiang Chinese Medical University Hangzhou China
2. The First Clinical Medical College Zhejiang Chinese Medical University Hangzhou China
3. Sir Run Run Shaw Hospital of Zhejiang University Hangzhou China
4. Department of General Practice Sir Run Run Shaw Hospital of Zhejiang University Hangzhou China
5. Department of Gastroenterology The Second Affiliated Hospital of Zhejiang Chinese Medical University Hangzhou China