1. London School of Hygiene & Tropical Medicine, London, United Kingdom;
2. Saw Swee Hock School of Public Health, National University of Singapore and National University Health Systems, Singapore, Singapore;
3. University of Minnesota, Minneapolis, Minnesota;
4. Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand;
5. Phramongkutklao College of Medicine, Bangkok, Thailand;
6. US Army Institute of Surgical Research, San Antonio, Texas;
7. Phramongkutklao Hospital, Bangkok, Thailand