%0 Journal Article %A Kenneth R. Chapman %A Andrew McIvor %T Asthma that is unresponsive to usual care %D 2010 %R 10.1503/cmaj.090089 %J Canadian Medical Association Journal %P 45-52 %V 182 %N 1 %U https://www.cmaj.ca/content/cmaj/182/1/45.full.pdf