1. Department of Internal Medicine, Division of Cardiology, Faculty of Health Sciences, School of Clinical Medicine, University of the Witwatersrand, Johannesburg 2193, South Africa
2. Wits Institute of Data Science, University of the Witwatersrand, Johannesburg 2000, South Africa
3. Faculty of Engineering and Built Environment, School of Electrical and Information Engineering, University of the Witwatersrand, Johannesburg 2000, South Africa
4. Netcare Sunninghill, Sunward Park Hospitals and the Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg 2196, South Africa
5. Department of Paediatrics and Child Health, Faculty of Health Sciences, School of Clinical Medicine, University of the Witwatersrand, Johannesburg 2193, South Africa