RT Journal Article SR Electronic T1 B type natriuretic peptide testing was more cost effective than conventional diagnosis in patients with acute dyspnoea JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 28 OP 28 DO 10.1136/ebm.12.1.28 VO 12 IS 1 YR 2007 UL http://ebm.bmj.com/content/12/1/28.abstract AB