1. Section of Medical Oncology, Department of Internal Medicine, Yale School of Medicine, Yale University , New Haven, CT , USA
2. Yale Cancer Center, Yale University , New Haven, CT , USA
3. Strengthening Oncology Services Research Unit, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
4. Division of Medical Oncology, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
5. Departments of Surgery and Radiation Oncology, Grey’s Hospital, University of KwaZulu-Natal , Pietermaritzburg , South Africa
6. National Cancer Registry, National Health Laboratory Service , Johannesburg , South Africa
7. Sydney Brenner Institute for Molecular Bioscience, Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
8. Department of Specialized Surgery, Inkosi Albert Luthuli Central Hospital, Durban and Ngwelezane Hospital, University of KwaZulu-Natal , Empangeni , South Africa
9. Department of Surgery, Ngwelezana Hospital, University of KwaZulu-Natal , Empangeni , South Africa
10. SAMRC/Wits Developmental Pathways to Health Research Unit, Department of Paediatrics, Faculty of the Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
11. South Africa Medical Research Council Common Epithelial Cancers Research Centre, Faculty of Health Sciences, University of Witwatersrand , Johannesburg , South Africa
12. Department of Psychology and Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami , Miami, FL , USA
13. Sylvester Comprehensive Cancer Center, University of Miami Health System , Miami, FL , USA
14. Department of Medicine, Miller School of Medicine, University of Miami , Miami, FL , USA
15. Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center , New York, NY , USA
16. Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University , New York, NY, USA
17. Department of Epidemiology, Mailman School of Public Health, Columbia University , New York, NY , USA
18. Department of Surgery, Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa