RT Journal Article SR Electronic T1 Asthma: a disease of variability JF Drug and Therapeutics Bulletin JO Drug Ther Bull FD BMJ Publishing Group Ltd SP 50 OP 50 DO 10.1136/dtb.2020.000069 VO 59 IS 4 A1 Jo Congleton YR 2021 UL http://dtb.bmj.com/content/59/4/50.abstract AB