RT Journal Article SR Electronic T1 Review: anticholinergics in addition to β2 agonists improve outcome in children and adults with acute asthma JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 21 OP 21 DO 10.1136/ebm.11.1.21 VO 11 IS 1 YR 2006 UL http://ebm.bmj.com/content/11/1/21.abstract AB