Budesonide-formoterol reliever therapy versus maintenance budesonide plus terbutaline reliever therapy in adults with mild to moderate asthma (PRACTICAL): a 52-week, open-label, multicentre, superiority, randomised controlled trial - Hardy, J; Baggott, C; Fingleton, J (Lancet, 2019)
. doi:10.1016/s0140-6736(19)31948-8