1. Institute of Social and Preventive Medicine (ISPM), University of Bern; Bern Switzerland
2. Health Economics and Epidemiology Research Office, Department of Medicine, Faculty of Health Sciences; University of the Witwatersrand; Johannesburg South Africa
3. Division of Infectious Diseases, Department of Medicine; University of Stellenbosch and Tygerberg Academic Hospital; Cape Town South Africa
4. Khayelitsha ART Programme and Médecins sans Frontières; Cape Town South Africa
5. National Cancer Registry, National Institute for Occupational Health, National Health Laboratory Service; Johannesburg South Africa
6. Graduate School for Cellular and Biomedical Sciences; University of Bern Switzerland
7. Center for Global Health and Development, Boston University; Boston MA
8. Centre for Infectious Disease Epidemiology and Research, School of Public Health and Family Medicine, University of Cape Town; South Africa