1. Department of Anaesthesiology, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg
2. Life Vincent Pallotti Rehabilitation Unit, Pinelands, Cape Town
3. Department of Neurology, Nelson R Mandela School of Medicine, Mayville, University of KwaZulu-Natal, Durban
4. Brain Function Research Group, School of Physiology, University of the Witwatersrand, Johannesburg
5. Department of Neurosurgery, University of the Witwatersrand, Johannesburg
6. Jacaranda Hospital, Muckleneuk, Pretoria
7. Christiaan Barnard Memorial Hospital, Cape Town
8. St Augustines Hospital, Durban