1. Queen Mary University of London, Barts & The London School of Medicine, Research Design Service, Centre for Primary Care and Public Health, Blizard Institute; London UK
2. Queen Mary University of London, Barts & The London School of Medicine, Centre for Primary Care and Public Health, Blizard Institute; Yvonne Carter Building 58 Turner Street London UK E1 2AB
3. Peninsula College of Medicine and Dentistry, Universities of Exeter & Plymouth; Veysey Building Salmon Pool Lane Exeter UK EX2 4SG
4. Kingston NHS Trust; Cardiology; Galsworthy Road Kingston Upon Thames Surrey UK KT2 7QB
5. Monash University/The Alfred Hospital; Department of Epidemiology & Preventive Medicine; Central & Eastern Clinical School, The Alfred Commercial Road Melbourne Victoria Australia 3004
6. Warwick Medical School; Warwick Medical School Clinical Trials Unit; Coventry Warwickshire UK CV4 7AL