1. Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
2. Department of Microbial Pathogenesis, University of Maryland, Baltimore, Maryland, USA
3. Division of Pulmonary and Critical Care Medicine, Harborview Medical Center, University of Washington, Seattle, Washington, USA
4. International Respiratory and Severe Illness Center, University of Washington, Seattle, Washington, USA
5. Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand