1. Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand,
South Africa
2. African Pain Research Initiative, Department of Anaesthesia and Perioperative Medicine, Neuroscience Institute, Faculty of Health Sciences, University of Cape Town,
South Africa
3. HIV Mental Health Research Unit, Department of Psychiatry and Mental Health, Neuroscience Institute, Faculty of Health Sciences, University of Cape Town,
South Africa