PT - JOURNAL ARTICLE ED - , TI - Stepping down asthma treatment AID - 10.1136/dtb.2021.000017 DP - 2021 Apr 13 TA - Drug and Therapeutics Bulletin PG - dtb-2021-000017 4099 - http://dtb.bmj.com/content/early/2021/04/12/dtb.2021.000017.short 4100 - http://dtb.bmj.com/content/early/2021/04/12/dtb.2021.000017.full AB -