RT Journal Article SR Electronic T1 Evidently… JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 39 OP 39 DO 10.1136/ebm.10.2.39 VO 10 IS 2 A1 Richard Lehman YR 2005 UL http://ebm.bmj.com/content/10/2/39.abstract AB