RT Journal Article SR Electronic T1 Reminders in echocardiography reports increased use of β blockers in reduced left ventricular ejection fraction JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 185 OP 185 DO 10.1136/ebm.12.6.185 VO 12 IS 6 YR 2007 UL http://ebm.bmj.com/content/12/6/185.abstract AB