1 Centre for Medical Ethics and Law, WHO Bioethics Collaborating Centre, Department of Medicine, Stellenbosch University, Cape Town, South Africa.
2 Division of Physiotherapy, Department of Health and Rehabilitation Sciences, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
3 Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.
4 Discipline of Dentistry, School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa.