The use of β 2 -agonist therapy before hospital attendance for severe asthma exacerbations: A post-hoc analysis
Journal article published in 2015 by
M. Patel,
J. Pilcher,
R. J. Hancox,
D. Sheahan,
A. Pritchard,
I. Braithwaite,
D. Shaw,
P. Black,
M. Weatherall,
R. Beasley 
