1. Massachusetts General Hospital, Division of Infectious Diseases, Boston, MA, USA
2. Massachusetts General Hospital, Medical Practice Evaluation Center, Boston, MA, USA
3. Harvard University, Center for AIDS Research (CFAR), Boston, MA, USA
4. Harvard Medical School, Boston, MA, USA
5. Massachusetts General Hospital, Biostatistics Center, Boston, MA, USA
6. McCord Hospital, Durban, South Africa
7. St. Mary’s Hospital, Mariannhill, Durban, South Africa
8. RAND Corporation, Santa Monica, CA, USA
9. Statistics South Africa, KwaZulu-Natal Provincial Office, Durban, South Africa