RT Journal Article SR Electronic T1 SUMSearch and PubMed JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 71 OP 71 DO 10.1136/ebm.5.3.71 VO 5 IS 3 A1 Booth, Andrew A1 O'rourke, Alan YR 2000 UL http://ebm.bmj.com/content/5/3/71.abstract AB