RT Journal Article SR Electronic T1 Stress echocardiography safely classified more patients as low risk of serious CAD than exercise electrocardiography JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 119 OP 119 DO 10.1136/ebm.12.4.119 VO 12 IS 4 YR 2007 UL http://ebm.bmj.com/content/12/4/119.abstract AB