1Strengthening Oncology Services Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
2Department of Radiation Oncology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
3SAMRC/Wits Developmental Pathways for Health Research Unit, Department of Paediatrics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
4National Cancer Registry, National Health Laboratory Service, Johannesburg, South Africa
5Sydney Brenner Institute for Molecular Bioscience, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
6Sylvester Comprehensive Cancer Center and Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL USA
7Department of Surgery, School of Clinical Medicine, University of KwaZulu-Natal, KwaZulu-Natal, South Africa
8Department of Surgery, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
9Department of Surgery, Ngwelezana Hospital, Empangeni and University of KwaZulu-Natal, Empangeni, KwaZulu-Natal South Africa
10Departments of Surgery and Radiation Oncology, Grey’s Hospital, University of KwaZulu-Natal, Pietermaritzburg, KwaZulu-Natal South Africa
11Herbert Irving Comprehensive Cancer Center, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY USA
12Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY USA
13Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY USA
14Division of Medical Oncology, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
15School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, 27 St Andrews Road, Parktown, Johannesburg, 2193 South Africa
16Environment and Lifestyle Epidemiology Branch, International Agency for Research On Cancer, (IARC/WHO), Lyon, France
17Global Health Research Institute, School of Human Development and Health, University of Southampton, Southampton, UK