PT - JOURNAL ARTICLE ED - , TI - Prevention strategies for asthma — secondary prevention DP - 2005 Sep 13 TA - Canadian Medical Association Journal PG - S25--S27 VI - 173 IP - 6 suppl 4099 - http://www.cmaj.ca/content/173/6_suppl/S25.short 4100 - http://www.cmaj.ca/content/173/6_suppl/S25.full SO - CMAJ2005 Sep 13; 173