1. ADVANCE-ID network, Saw Swee Hock School of Public Health, National University of Singapore , Singapore , Singapore
2. Department of Medicine, National University of Singapore , Singapore , Singapore
3. Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford , Oxford , United Kingdom
4. Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University , Bangkok , Thailand
5. Division of Infectious Diseases, University Medicine Cluster, National University Hospital , Singapore , Singapore