RT Journal Article SR Electronic T1 Review: omalizumab reduces exacerbation and steroid use in chronic asthma JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 11 OP 11 DO 10.1136/ebm.12.1.11 VO 12 IS 1 YR 2007 UL http://ebm.bmj.com/content/12/1/11.abstract AB