1. Department of Microbiology and Life Sciences Institute Immunology Programme, National University of Singapore, Singapore 117597, Singapore.
2. Duke–NUS Graduate Medical School, Singapore 169857, Singapore.
3. Center for BioImaging Sciences, National University of Singapore, Singapore 117546, Singapore.
4. Novartis Institute for Tropical Diseases, Singapore 138670, Singapore.
5. Communicable Diseases Center and Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore 308433, Singapore.
6. Cambridge Institute for Medical Research and Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge CB22XY, UK.
7. Defense Medical and Environmental Research Institute, Defence Science Organisation National Laboratories, Singapore 117510, Singapore.
8. Infectious Disease Division, National University Hospital, Singapore 129793, Singapore.