RT Journal Article SR Electronic T1 Rectal administration of NSAIDs in the prevention of post-ERCP pancreatitis: a complementary meta-analysis JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1632 OP 1633 VO 57 IS 11 A1 Zheng, M-H A1 Xia, H H-X A1 Chen, Y-P YR 2008 UL http://gut.bmj.com/content/57/11/1632.abstract AB