University of KwaZulu-Natal - Centre for the AIDS Programme of Research in South Africa, University of Manitoba - Department of Medical Microbiology and Infectious Diseases, University of Manitoba - Department of Medical Microbiology and Infectious Diseases, University of Manitoba - Department of Medical Microbiology and Infectious Diseases, University of Toronto - Department of Medicine, University of Miami - Department of Pediatrics, University of Washington, International Centre for Reproductive Health, International Centre for Reproductive Health, International Centre for Reproductive Health, University of Manitoba, University of Manitoba - Department of Medical Microbiology and Infectious Diseases, University of Toronto - Department of Medicine, University of Manitoba - Department of Medical Microbiology and Infectious Diseases and University of KwaZulu-Natal - Centre for the AIDS Programme of Research in South Africa