1. St George's, University of London; Population Health Research Institute; Cranmer Terrace London UK SW17 0RE
2. Hemel Hempstead Hospital; Thoracic Medicine; Hillfield Road Hemel Hempstead Herts UK HP2 4AD
3. Harefield Hospital; Hill End Road Harefield UK UB9 6JH
4. University Hospital of South Manchester; University of Manchester, NIHR Respiratory and Allergy Clinical Research Facility; Manchester UK
5. Lancashire Teaching Hospitals NHS Foundation Trust; Preston UK
6. Lancaster University; Faculty of Health and Medicine; Bailrigg Lancaster Lancashire UK LA1 4YD