RT Journal Article SR Electronic T1 Why A-level evidence does not make it to clinicians’ A-list: the case of thromboprophylaxis in medical patients JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 133 OP 134 DO 10.1136/ebm.13.5.133 VO 13 IS 5 A1 James D Douketis A1 Nancy S Lloyd YR 2008 UL http://ebm.bmj.com/content/13/5/133.abstract AB