1. Biomedical Research Division, Nay Pyi Taw, Myanmar;
2. Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand;
3. Department of Microbiology and Immunology, University of Nevada, Reno School of Medicine, Reno, Nevada;
4. Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand;
5. Defence Services Medical Research Centre, Nay Pyi Taw, Myanmar