James InciardiPh.D. is the Director of the centre for Drug and Alcohol Studies at the University of Delaware a Professor in the Department of Sociology and Criminal Justice at Delaware an Adjunce Professor in the Department of Epidemiology and Public Health at the University of Miami School of Medicine and a Guest Professor in the Department of Psychiatry at the Federal University of Rio Grande do Sul in Porto Alegre, Brazil, and was the Principal Investigator of the Brazil-based HIV/AIDS prevention/intervention project. Hilary Surratt M.A. is an Associate Scientist in the centre for Drug and Alcohol Studies at the University of Delaware, and was the Co-Principal Investigator and Project Director of the Brazil-based HIV/AIDS prevention/intervention project.Paulo Telles M.D., Ph.D. is a Senior Researcher in the Nucleo de Estudos e Pesquisas em Aten ao ao Uso de Drogas at the State University of Rio de Janeiro, and was the Scientific Director of the Brazil-based HIV/AIDS prevention/intervention project. James InciardiPh.D. is the Director of the centre for Drug and Alcohol Studies at the University of Delaware a Professor in the Department of Sociology and Criminal Justice at Delaware an Adjunce Professor in the Department of Epidemiology and Public Health at the University of Miami School of Medicine and a Guest Professor in the Department of Psychiatry at the Federal University of Rio Grande do Sul in Porto Alegre, Brazil, and was the Principal Investigator of the Brazil-based HIV/AIDS prevention/intervention project. Hilary SurrattM.A. is an Associate Scientist in the centre for Drug and Alcohol Studies at the University of Delaware, and was the Co-Principal Investigator and Project Director of the Brazil-based HIV/AIDS prevention/intervention project.Paulo Telles M.D., Ph.D. is a Senior Researcher in the Nucleo de Estudos e Pesquisas em Aten ao ao Uso de Drogas at the State University of Rio de Janeiro, and was the Scientific Director of the Brazil-based HIV/AIDS prevention/intervention project. James InciardiPh.D. is the Director of the centre for Drug and Alcohol Studies at the University of Delaware a Professor in the Department of Sociology and Criminal Justice at Delaware an Adjunce Professor in the Department of Epidemiology and Public Health at the University of Miami School of Medicine and a Guest Professor in the Department of Psychiatry at the Federal University of Rio Grande do Sul in Porto Alegre, Brazil, and was the Principal Investigator of the Brazil-based HIV/AIDS prevention/intervention project. Hilary SurrattM.A. is an Associate Scientist in the centre for Drug and Alcohol Studies at the University of Delaware, and was the Co-Principal Investigator and Project Director of the Brazil-based HIV/AIDS prevention/intervention project