RT Journal Article SR Electronic T1 Review: opiate administration may alter physical examination findings but does not increase management errors in acute abdominal pain JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 23 OP 23 DO 10.1136/ebm.12.1.23 VO 12 IS 1 YR 2007 UL http://ebm.bmj.com/content/12/1/23.abstract AB