RT Journal Article SR Electronic T1 Evidently... JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 105 OP 105 DO 10.1136/ebm.10.4.105 VO 10 IS 4 A1 Richard Lehman YR 2005 UL http://ebm.bmj.com/content/10/4/105.abstract AB