Affiliation: | 1. York Trials Unit, Department of Health Sciences, University of York, York, UK;2. Lung Function and Sleep, Queen Elizabeth Hospital Birmingham, University of Birmingham, Birmingham, UK;3. NHS England and Public Health England, London, UK;4. Hull York Medical School, York, UK;5. James Alexander Family Practice, Hull, England;6. Escrick Surgery, York, England;7. Institute of Health and Society, Newcastle University, Newcastle, UK |