1. National Heart and Lung Institute, Imperial College London , B Block, Hammersmith Hospital, Du Cane Road, London W12 0HS , UK
2. School of Public Health, Imperial College London , London , UK
3. Hammersmith Hospital, Imperial College Healthcare NHS Trust , London , UK
4. Warrington and Halton Hospitals NHS Foundation Trust , Liverpool , UK
5. Hebrew University Jerusalem , Jerusalem , Israel
6. Shaare Zadek Medical Center , Jerusalem , Israel
7. Bielefeld Hospital , Bielefeld , Germany