Affiliation: | Xiao-Ling Wu, Pi-Long Wang, Chun-Tao Lei, Department of Gastroenterology, First Affiliated Hospital, Chongqing University of Medical Sciences, Chongqing 400016, ChinaWei-Zheng Zeng, Ming-De Jiang, Xiao-Bin Chen, Yong Zhang, Hui Xu, Zhao Wang, Department of Digestion, General Hospital of Chengdu Military Command, Chengdu 610083, Sichuan Province, China Supported by the Tenth-Five Year Plan of Medical Science Foundation of Chengdu Military Command, No. 01A009 |