University of Manitoba, University of Manitoba, University of Manitoba, University of Manitoba, University of Manitoba, University of Manitoba, University of Manitoba, University of Washington, University of Washington, University of Washington - Department of Global Health, University of Washington - Department of Global Health, Fred Hutchinson Cancer Research Center, Fred Hutchinson Cancer Research Center, University of KwaZulu-Natal - Centre for the AIDS Programme of Research in South Africa (CAPRISA), University of Washington - Department of Global Health, South African Medical Research Council and University of KwaZulu-Natal - Centre for the AIDS Programme of Research in South Africa