1. Lecturer in Embedded and Intelligent Systems, University of Essex, Colchester, U.K.
2. Clinical Senior Lecturer at King's College London, London, U.K.
3. Department of Paediatrics, University of the Witwatersrand Johannesburg, Johannesburg, South Africa
4. University of Essex, Colchester, U.K.
5. Human and Social Development Programme at the Human Sciences Research Council (HSRC), University of the Witwatersrand Johannesburg, Johannesburg, South Africa