[1] Chinese Acad Prevent Med, Inst Parasit Dis, Shanghai 200025, Peoples R China
[2] Univ Queensland, Brisbane, Qld, Australia
[3] Queensland Inst Med Res, Australian Ctr Int & Trop Hlth & Nutr, Brisbane, Qld 4006, Australia
[4] WHO Special Programme Res & Training Trop Dis, Geneva, Switzerland