RT Journal Article SR Electronic T1 Review: smooth muscle relaxants improve symptoms and reduce pain in irritable bowel syndrome JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 153 OP 153 DO 10.1136/ebm.6.5.153 VO 6 IS 5 YR 2001 UL http://ebm.bmj.com/content/6/5/153.abstract AB