1. Department of Anthropology, College of Social Sciences and Philosophy, University of the Philippines Diliman, Quezon City, Philippines.
2. Neglected Tropical Diseases Study Group, National Institutes of Health, University of the Philippines Manila, Manila, Philippines.
3. Neglected Tropical Diseases Study Group, National Institutes of Health, University of the Philippines Manila, Manila, Philippines; Department of Mathematics and Statistics, De La Salle University, Manila, Philippines.
4. Deutsche Gesellschaft für Internationale Zusammenarbeit GmbH, Bonn, Germany.
5. Neglected Tropical Diseases Study Group, National Institutes of Health, University of the Philippines Manila, Manila, Philippines; Department of Parasitology, College of Public Health, University of the Philippines Manila, Manila, Philippines.