1. Mahidol-Oxford Tropical Medicines Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
2. Epidemiology Division, Department of Disease Control, Ministry of Public Health, Nonthaburi, Thailand
3. Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, Old Road Campus, University of Oxford, Oxford, United Kingdom
4. Department of Medicine, University of Cambridge, Cambridge, United Kingdom
5. Office of International Cooperation Department of Disease Control, Ministry of Public Health, Nonthaburi, Thailand
6. Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand