1. Department of Psychology, University of the Free State, Bloemfontein, South Africa
2. Department of Psychology, College of Medical and Health Science, Asia University, Taichung, Taiwan
3. South African Medical Research Council/University of Johannesburg (SAMRC/UJ) - Pan African Centre for Epidemics Research (PACER) Extramural Unit, Johannesburg, South Africa
4. Department of Environmental Health, Faculty of Health Sciences, University of Johannesburg, South Africa