RT Journal Article SR Electronic T1 Defining treatment resistance in the irritable bowel syndrome JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 723 OP 726 DO 10.1136/gut.41.5.723-a VO 41 IS 5 A1 RAJAGOPALAN, MANI YR 1997 UL http://gut.bmj.com/content/41/5/723.1.abstract AB