[1] Mahidol Univ, Fac Trop Med, Dept Clin Trop Med, Bangkok 10700, Thailand
[2] Mahosot Hosp, Microbiol Lab, Wellcome Trust Mahosot Hosp Oxford Trop Med Res C, Viangchan, Laos
[3] Univ Oxford, Hosp Trop Dis, Clin Res Unit, Ho Chi Minh City, Vietnam
[4] Univ Nova Lisboa, Ctr Malaria & Outras Doencas Tropicais, Inst Higiene & Med Trop, P-1200 Lisbon, Portugal
[5] Papua New Guinea Inst Med Res, Madang, Papua N Guinea
[6] Museum Natl Hist Nat, Parasitol Comparee & Modeles Expt USM0307, F-75231 Paris, France
[7] Univ Oxford, Nuffield Dept Clin Med, Ctr Trop Med, Oxford, England