RT Journal Article SR Electronic T1 Letter JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 61 OP 61 DO 10.1136/ebm.10.2.61 VO 10 IS 2 A1 David A. Nardone YR 2005 UL http://ebm.bmj.com/content/10/2/61.1.abstract AB