1. College of Medicine, University of the Philippines, Manila, Philippines.
2. Department of Medical Microbiology, College of Public Health, University of the Philippines, Manila, Philippines.
3. Department of Molecular and Cellular Biology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan.
4. Research and Biotechnology, Center for Basic Science Research, St. Luke's Medical Center, Quezon City, Philippines.