1. Virology Unit, Institut Pasteur in Cambodia, Phnom Penh 12000, Cambodia
2. Kantha Bopha Hospital, Phnom Penh 12000, Cambodia
3. Medical Laboratory, Institut Pasteur in Cambodia, Phnom Penh 12000, Cambodia
4. PathoQuest SAS, Paris 75013, France
5. Department of Medical Microbiology, Academic Medical CenterUniversity of Amsterdam, Amsterdam 1012, The Netherlands
6. World Health Organization, Geneva 1211, Switzerland
7. Biology of Infection Unit, Institut Pasteur, Inserm U1117, Paris 75015, France
8. Aix Marseille Université, IRD French Institute of Research for Development, EHESP French School of Public Health, Marseille 35043, France
9. Oxford University Clinical Research Unit, Wellcome Trust Major Overseas Programme, Ho Chi Minh City P1Q5, Vietnam
10. Epidemiology & Public Health Unit, Institut Pasteur in Cambodia, Phnom Penh 12000, Cambodia
11. GlaxoSmithKline Vaccines Asia-Pacific, Singapore 189720, Singapore