1. Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611, USA.
2. Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
3. Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand.
4. Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA.
5. GlaxoSmithKline (GSK) Vaccines, 637421 Singapore, Singapore.
6. Institut Pasteur in Cambodia, Réseau International des Instituts Pasteur, Phnom Penh 12201, Cambodia.
7. Department of Zoology, University of Cambridge, Cambridge, CB2 3EJ UK.
8. Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
9. Department of Genetics, University of Cambridge, Cambridge, CB2 3EJ UK.