1. Section Sports Medicine & Sport, Exercise Medicine and Lifestyle Institute (SEMLI), Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
2. Sport, Exercise Medicine and Lifestyle Institute (SEMLI), Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
3. SEMLI, International Olympic Committee (IOC) Research Centre, Pretoria, South Africa
4. Emeritus Professor of Sport and Exercise Medicine, Faculty of Health Sciences, University of Cape Town, Rondebosch, 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