RT Journal Article SR Electronic T1 Evidently… JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 102 OP 102 DO 10.1136/ebm.11.4.102 VO 11 IS 4 A1 Lehman, Richard YR 2006 UL http://ebm.bmj.com/content/11/4/102.abstract AB