PT - JOURNAL ARTICLE ED - , TI - Review: medication adjustment based on fractional exhaled nitric oxide did not prevent asthma exacerbations AID - 10.1136/ebm.14.1.8 DP - 2009 Feb 01 TA - Evidence Based Medicine PG - 8--8 VI - 14 IP - 1 4099 - http://ebm.bmj.com/content/14/1/8.short 4100 - http://ebm.bmj.com/content/14/1/8.full SO - Evid Based Med2009 Feb 01; 14