1. Amsterdam Institute for Social Science Research, University of Amsterdam, Amsterdam, the Netherlands
2. African Studies Centre Leiden, Leiden University, Leiden, the Netherlands
3. University Medical Center, Amsterdam, Amsterdam, the Netherlands
4. Boston University School of Medicine, Boston, MA, USA
5. Rhodes University, Grahamstown, South Africa
6. Leiden University Medical Centre, Leiden, Netherlands
7. Amsterdam Institute of Global Health and Development, Amsterdam, the Netherlands
8. Children's Institute, University of Cape Town, Cape Town, South Africa