RT Journal Article SR Electronic T1 The Wells rule was not useful in ruling out deep venous thrombosis in a primary care setting JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 57 OP 57 DO 10.1136/ebm.11.2.57 VO 11 IS 2 YR 2006 UL http://ebm.bmj.com/content/11/2/57.abstract AB