1. National Clinical Research Center for Digestive Diseases
2. Beijing Digestive Disease Center
3. Beijing Key Laboratory for Precancerous Lesion of Digestive Diseases
4. Department of Gastroenterology
5. Beijing Friendship Hospital
6. School of Chemical Biology and Pharmaceutical Sciences
7. Capital Medical University
8. People's Republic of China
9. Department of Pharmacy
10. Beijing Tongren Hospital
11. Affiliated Hospital of Weifang Medical University