1. Section of Environment and Radiation; International Agency for Research on Cancer; Lyon France
2. Windhoek Central Hospital; Windhoek Namibia
3. Makerere University; Kampala Uganda
4. Federal Medical Centre; Owerri Nigeria
5. Abia State University Teaching Hospital; Aba Nigeria
6. University of North Carolina; Chapel Hill USA
7. University of the Witwatersrand, Chris Hani Baragwanath Academic Hospital; Johannesburg South Africa
8. Namibian Institute of Pathology; Windhoek Namibia
9. University Teaching Hospital; Lusaka Zambia
10. Fred Hutchinson Cancer Research Center; Seattle Washington USA
11. Department of Non-Communicable Disease Epidemiology; London School of Hygiene & Tropical Medicine; London UK