RT Journal Article SR Electronic T1 Addition of salmeterol to usual asthma pharmacotherapy may increase respiratory related deaths or life threatening experiences JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 139 OP 139 DO 10.1136/ebm.11.5.139 VO 11 IS 5 YR 2006 UL http://ebm.bmj.com/content/11/5/139.abstract AB