1. Strengthening Oncology Services Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
2. South African MRC and the University of the Witwatersrand Centre for Common Epithelial Cancers Research Centre (CECRC), Johannesburg, South Africa
3. Department of Radiation Oncology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
4. SAMRC/Wits Developmental Pathways for Health Research Unit, Department of Paediatrics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
5. Division of Medical Oncology, University of Witwatersrand Faculty of Health Sciences, Johannesburg, South Africa
6. Soweto Comprehensive Cancer Centre (SCCC), Chris Hani Baragwanath Academic Hospital, Johannesburg, South Africa
7. Department of Surgery, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
8. School of Human Development and Health, University of Southampton, Southampton, UK