作者机构:[1]Department of Digestive Diseases, Beijing Friendship Hospital,Capital Medical University Beijing Key Laboratory for Precancerous Lesion of Digestive Diseases Beijing Digestive Diseases Center,Beijing 100050, China
相关基金:This work was supported by grants from the Beijing Natural Science Foundation (No.7122055) and the National Natural Science Foundation of China (No.81071974).
Correspondence to: Zhang Shutian, Department of Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China (Email: zhangst@ccmu.edu.cn)