1. Cardiovascular Research Centre and Cardiovascular Magnetic Resonance Unit; Royal Brompton Hospital; London UK
2. National Heart & Lung Institute; Imperial College; London UK
3. London School of Hygiene and Tropical Medicine; London UK
4. Norwich Medical School; University of East Anglia; Norwich UK
5. National Heart Centre Singapore; Singapore
6. Robertson Centre for Biostatistics; University of Glasgow; Glasgow UK