1. The Instituto Nacional de Infectologia Evandro Chagas; Fundação Oswaldo Cruz; Rio de Janeiro Brazil
2. Medical Practice Evaluation Center; Massachusetts General Hospital; Boston MA USA
3. Division of General Internal Medicine; Massachusetts General Hospital; Boston MA USA
4. Harvard University Center for AIDS Research; Harvard Medical School; Boston MA USA
5. Department of Orthopedic Surgery; Brigham and Women's Hospital; Boston MA USA
6. Department of Biostatistics; Boston University School of Public Health; Boston MA USA
7. Biostatistics Center; Massachusetts General Hospital; Boston MA USA
8. Division of Infectious Disease; Massachusetts General Hospital; Boston MA USA
9. 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. Division of Infectious Disease; Brigham and Women's Hospital; Boston MA USA
11. Yale School of Public Health; New Haven CT USA