1. Department of Parasitology, College of Public Health, University of the Philippines, Manila, Philippines; Neglected Tropical Diseases Study Group, National Institutes of Health, University of the Philippines, Manila, Philippines.
2. Department of Biological Sciences and Environmental Studies, College of Science and Mathematics, University of the Philippines, Mindanao, Philippines.
3. National Institute of Molecular Biology and Biotechnology, National Institutes of Health, University of the Philippines, Manila, Philippines.
4. Department of Biology, College of Science, De La Salle University, Manila, Philippines.
5. Department of Environmental and Occupational Health, College of Public Health, University of the Philippines, Manila, Philippines.
6. Department of Anthropology, College of Social Sciences and Philosophy, University of the Philippines, Diliman, Philippines.
7. Department of Epidemiology and Biostatistics, College of Public Health, University of the Philippines, Manila, Philippines.
8. Neglected Tropical Diseases Study Group, National Institutes of Health, University of the Philippines, Manila, Philippines.