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 M-H Zheng A1 H H-X Xia A1 Y-P Chen YR 2008 UL http://gut.bmj.com/content/57/11/1632.abstract AB