Sweeney J, Patterson CC, Menzies-Gow A, Niven RM, Mansur AH, Bucknall C, Chaudhuri R, Price D, Brightling CE, Heaney LG; on behalf of the British Thoracic Society Difficult Asthma Network

Thorax 2016; 71(4): 339-46. [PubMed] [Full Text]