Authors: Juming Ma; J Ma; Xiaoping He; X He; Weiguo Wang; W Wang; Yao Huang; Y Huang; Lin Chen; L Chen; Wenming Cong; W Cong; Jianzhong Gu; J Gu; Huizhen Hu; H Hu; Jianguo Shi; J Shi; Linfang Li; L Li; Changqing Su; C Su Journal: Dig Dis Sci Date: 2008-11-26 Impact factor: 3.199