1. National Heart & Lung Institute, Imperial College; Dovehouse Street London SW3 6LY UK
2. Royal Brompton and Harefield NHS Trust; London UK
3. West Middlesex Hospital NHS Trust; Middlesex UK
4. Hillingdon Hospital NHS Trust; Middlesex UK
5. Health Economic Research Group; Brunel University; Middlesex UK
6. Ealing Hospital NHS Trust; London UK