Conflict of Interest DisclosuresJKQ reports grants from the Medical Research Council (MRC), GlaxoSmithKline (GSK), British Lung Foundation (BLF), Wellcome Trust, during the conduct of the study, and personal fees from AstraZeneca and Boehringer Ingelheim, outside of the submitted work. MS reports other current research grants from Arthritis Research UK, Public Health England and the EU EITHealth Programme, with no conflicts of interest. SS reports grants from the National Institute for Health Research (NIHR), GlaxoSmithKline (GSK), Boehringer Ingelheim and Novartis and personal fees from Novartis and AstraZeneca. All other authors report no other conflicts of interest.
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AbstractBackground: In previous systematic reviews, predominantly of randomised controlled trials,