1. Fred Hutchinson Cancer Center, Seattle, Washington, USA
2. Centro de Investigaciones Tecnológicas, Biomédicas y Medioambientales, Universidad Nacional Mayor de San Marcos, Lima, Peru
3. Columbia University Physicians & Surgeons, New York, New York, USA
4. University of Zimbabwe Clinical Trials Research Centre, Harare, Zimbabwe
5. Hutchinson Centre for Research in South Africa, Johannesburg, Republic of South Africa
6. Ndlovu Research Centre, Elandsdoorn, Limpopo, Republic of South Africa
7. Desmond Tutu HIV Foundation, University of Cape Town, Cape Town, Republic of South Africa