PT - JOURNAL ARTICLE ED - , TI - Review: herbal preparations may improve FEV<sub>1</sub> and symptoms in asthma AID - 10.1136/ebn.4.3.82 DP - 2001 Jul 01 TA - Evidence Based Nursing PG - 82--82 VI - 4 IP - 3 4099 - http://ebn.bmj.com/content/4/3/82.short 4100 - http://ebn.bmj.com/content/4/3/82.full SO - Evid Based Nurs2001 Jul 01; 4