1. Cardiovascular Centre; OLV Hospital; Aalst Belgium
2. Faculty of Health; University of Technology Sydney; Sydney Australia
3. School of Nursing and Midwifery; The Flinders University of South Australia; Adelaide Australia
4. Department of Non-communicable Disease Epidemiology; London School of Hygiene and Tropical Medicine; London UK
5. Robertson Centre for Biostatistics and Clinical Trials; University of Glasgow and National Heart and Lung Institute, Imperial College London; London UK