1. Division Health Sciences Education, Office of the Dean, Faculty of Health Sciences, University of the Free State, Bloemfontein, Free State, South Africa
2. Department of Optometry, Faculty of Health Sciences, University of the Free State, Bloemfontein, Free State, South Africa
3. School Of Allied Health Professions, Faculty of Health Sciences, University of the Free State, Bloemfontein, Free State, South Africa
4. Educational development and research department, Faculty of health, medicine and life sciences, Maastricht University, Maastricht, The Netherlands