1. International Health Institute, Brown University, Providence, Rhode Island; The Research Institute for Tropical Medicine, Alabang, The Philippines; Nanjing Medical College, Nanjing, China; Jiangxi Institute for Parasitic Diseases, Nanchang, China; University of the Philippines College of Medicine, Manila, The Philippines; The Provincial Health Office of Leyte, Palo, Leyte, Philippines; Schistosomiasis Control Service, Department of Health, Manila, The Philippines