1. Department of Preventative Health Sciences, School of Health Sciences, Faculty of Health, Natural Resources and Applied Sciences, Namibia University of Science and Technology (NUST), Windhoek, Namibia
2. Department of Occupational Therapy and Physiotherapy, Faculty of Health Sciences and Veterinary Medicine, University of Namibia (UNAM), Windhoek, Namibia
3. Division of Emergency Medicine, Department of Family, Community and Emergency Medicine, University of Cape Town (UCT), Cape Town, South Africa