1. Institute of Social and Preventive Medicine (ISPM); University of Bern; Bern; Switzerland
2. Khayelitsha ART Programme; Médecins Sans Frontières; Cape Town; South Africa
3. Newlands Clinic; Harare; Zimbabwe
4. Division of Infectious Diseases; Department of Medicine; University of Stellenbosch and Tygerberg Hospital; Cape Town; South Africa
5. Centre for Infectious Disease Epidemiology and Research; School of Public Health and Family Medicine; University of Cape Town; Cape Town; South Africa
6. Centre for Infectious Disease Research in Zambia (CIDRZ); Lusaka; Zambia
7. The Desmond Tutu HIV Centre; Institute for Infectious Disease and Molecular Medicine; University of Cape Town; Cape Town; South Africa