1. Division of General Medicine; Massachusetts General Hospital; Boston MA USA
2. Division of Infectious Diseases; Massachusetts General Hospital; Boston MA USA
3. Medical Practice Evaluation Center; Massachusetts General Hospital; Boston MA USA
4. Harvard Medical School; Boston MA USA
5. Harvard Center for AIDS Research; Harvard University; Boston MA USA
6. AIDS Healthcare Foundation/Ithembalabantu Clinic; Durban South Africa
7. New York University Medical School; New York NY USA
8. Harvard Center for AIDS Research; Harvard University; Boston MA USA. Division of Infectious Diseases; Brigham and Women's Hospital; Boston MA USA
9. Harvard Center for AIDS Research; Harvard University; Boston MA USA. Department of Epidemiology; Boston University School of Public Health; Boston MA USA. Department of Health Policy and Management; Harvard School of Public Health; Boston MA USA
10. Department of Biostatistics; Boston University School of Public Health; Boston MA USA. Department of Orthopedic Surgery; Brigham and Women's Hospital; Boston MA USA