1. Keele Cardiovascular Research Group, Centre for Prognosis Research, Institute for Primary Care and Health Sciences Keele University Newcastle UK
2. Victoria Heart Institute Foundation Royal Jubilee Hospital Victoria British Columbia Canada
3. St Georges' Hospitals NHS Foundation trust London UK
4. University of Southampton Southampton, & University Hospital Southampton NHS Trust Southampton UK
5. Birmingham Medical School University of Birmingham Birmingham UK
6. Institute of Cardiovascular Sciences Birmingham University Birmingham UK
7. Department of Cardiology University Hospital of Wales Cardiff UK