1. Division of Infectious Diseases Vanderbilt University Medical Center Nashville TN USA
2. Department of Biostatistics Vanderbilt University Medical Center Nashville TN USA
3. Instituto Nacional de Infectiologia Evandro Chagas Fiocruz Brazil
4. Universidad Peruana Cayetano HerediaInstituto de Medicina Tropical Alexander von Humboldt Lima Peru
5. Fundación Huésped Investigaciones Clínicas Buenos Aires Argentina
6. Instituto Hondureño de Seguridad Social and Hospital Escuela Universitario Tegucigalpa Honduras
7. Deparatmento de Infectologia Instituto Nacional de Ciencias Médicas y NutriciónSalvador Zubirán. Mexico City Mexico
8. São Paulo State Department of Health Institute of Health São Paulo Brazil
9. São Paulo State Department of Health AIDS Reference and Training Center São Paulo Brazil
10. Care and Treatment Clinic of the Partenon Sanatorium Rio Grande do Sul State Department of Health Porto Alegre Brazil
11. University of Vale do Rio dos Sinos São Leopoldo Brazil
12. Medical School Federal University of Minas Gerais Belo Horizonte Brazil
13. Edgar Santos University Hospital Complex Federal University of Bahia Salvador Brazil
14. Fundaciòn Arriaran and University of Chile School of Medicine Santiago Chile
15. Department of Preventive Medicine University of São Paulo School of Medicine São Paulo Brazil