1. Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA
2. Woodrow Wilson School of Public and International Affairs, Princeton University, Princeton, NJ, USA
3. Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan
4. Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
5. Oxford University Clinical Research Unit—Wellcome Trust Major Overseas Programme, National Hospital for Tropical Diseases, Ha Noi, Viet Nam
6. Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
7. Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
8. Fogarty International Center, National Institutes of Health, Bethesda, MD, USA