1. Division of Exercise Science & Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
2. Sport, Exercise Medicine and Lifestyle Institute (SEMLI) and Section Sports Medicine, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
3. International Olympic Committee (IOC) Research Centre, Pretoria, South Africa
4. Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
5. Biostatistics Unit, South African Medical Research Council, Cape Town, South Africa
6. Statistics and Population Studies Department, University of the Western Cape, Cape Town, South Africa
7. Institute for Sport and Exercise Medicine, Faculty of Medicine & Health Sciences, University of Stellenbosch, Stellenbosch, South Africa