Johns Hopkins University - Department of Medicine, University of Cape Town (UCT) - Wellcome Centre for Infectious Diseases Research in Africa, University of Cape Town (UCT) - Wellcome Centre for Infectious Diseases Research in Africa, Oregon Health and Science University, Kaiser Permanente - Kaiser Permanente Medical Center, University of Minnesota - Minneapolis - School of Public Health, University of Cape Town (UCT) - Department of Medicine, University of Cape Town (UCT) - Department of Medicine, University of Cape Town (UCT) - Department of Medicine, University of Cape Town (UCT) - Department of Medicine, University of Cape Town (UCT) - Wellcome Centre for Infectious Diseases Research in Africa, University of Cape Town (UCT) - Department of Medicine, University of Cape Town (UCT) - Department of Medicine and Hennepin Healthcare Research Institute