1. University of Southampton School of Medicine; Southampton; UK
2. King's College London; MRC & Asthma UK Centre in Allergic Mechanisms of Asthma. Division of Asthma; Allergy and Lung Biology. Guy's and St Thomas’ NHS Foundation Trust; London; UK
3. Singleton Hospital; Swansea; UK
4. St Peter's Hospital; Chertsey; UK
5. Royal Free Hampstead NHS Trust; London; UK
6. Northwick Park Hospital; Harrow; UK
7. Newcastle General Hospital; Newcastle; UK
8. David Hide Asthma and Allergy Research Centre; St Mary's Hospital; Isle of Wight; UK
9. University Hospital of Wales; Cardiff; UK
10. University of Manchester; Royal Manchester Children's Hospital; Manchester; UK
11. Poole Hospital; Poole; UK
12. Scunthorpe General Hospital; Scunthorpe; UK
13. Hillingdon Hospital; Middlesex; UK
14. Biomedical Research Centre; Imperial College and Imperial College Healthcare NHS Trust; London; UK