1. Division of Cardiology Department of Medicine Faculty of Medicine and Health Sciences University of Stellenbosch and Tygerberg Academic Hospital Cape Town South Africa
2. Kings College Hospital London UK
3. Echocardiography Laboratory Barts Heart Centre St Bartholomew’s Hospital London UK
4. Institute of Cardiovascular Sciences UCL London UK
5. William Harvey Research Institute Queen Mary University of London London UK
6. Division of Epidemiology and Biostatistics University of Stellenbosch Cape Town South Africa
7. Biostatistics Unit South African Medical Research Council Cape Town South Africa