RT Journal Article SR Electronic T1 Limited evidence that single-dose oral ibuprofen plus codeine is more effective for postoperative pain than either drug alone JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 51 OP 52 DO 10.1136/eb-2013-101421 VO 17 IS 2 A1 Jaime L Baratta A1 Kishor Gandhi A1 Eugene R Viscusi YR 2014 UL http://ebn.bmj.com/content/17/2/51.abstract AB