RT Journal Article SR Electronic T1 Review: smooth muscle relaxants treat abdominal pain and loperamide reduces diarrhoea in irritable bowel syndrome JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 20 OP 20 DO 10.1136/ebm.6.1.20 VO 6 IS 1 YR 2001 UL http://ebm.bmj.com/content/6/1/20.abstract AB