RT Journal Article SR Electronic T1 Evidence-based medicine in practice JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 68 OP 69 DO 10.1136/ebm.7.3.68 VO 7 IS 3 A1 Sharon E Straus YR 2002 UL http://ebm.bmj.com/content/7/3/68.abstract AB