1. Section of Environment and Radiation; International Agency for Research on Cancer; Lyon France
2. Department of Internal Medicine; Faculty of Health Sciences, University of Witwatersrand; Johannesburg South Africa
3. Wits Health Consortium; MRC/Wits Developmental Pathways to Health Research Unit, Faculty of Health Sciences, University of Witwatersrand; Johannesburg South Africa
4. Department of Epidemiology; Mailman School of Public Health, Columbia University; New York NY, US
5. Information Management Directorate; Gauteng Provincial Department of Health, Bank of Lisbon; Johannesburg South Africa
6. Department of Surgery; Faculty of Health Sciences, University of the Witwatersrand; Johannesburg South Africa
7. Chris Hani Baragwanath Academic Hospital Breast Clinic; Soweto South Africa