1. Department of Virology, U.S. Army Medical Directorate – Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
2. University of the Philippines Manila, Ermita, Manila, Philippines
3. Department of Bacterial and Parasitic Diseases, U.S. Army Medical Directorate – Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
4. V Luna Medical Center, Armed Forces of the Philippines Health Service Command, V Luna Ave., Quezon City, Philippines
5. Bacterial Disease Branch, Walter Reed Army Institute of Research, MD