RT Journal Article SR Electronic T1 Mechanisms of reducing postoperative pain, nausea and vomiting: a systematic review of current techniques JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 75 OP 80 DO 10.1136/ebmed-2011-100265 VO 17 IS 3 A1 Alex Rawlinson A1 Nina Kitchingham A1 Colin Hart A1 Gregory McMahon A1 Seok Ling Ong A1 Achal Khanna YR 2012 UL http://ebm.bmj.com/content/17/3/75.abstract AB