[1] Ctr Malaria & Outras Doencas Trop, P-1300 Lisbon, Portugal
[2] Danderyd Hosp, Div Infect Dis, S-18288 Danderyd, Sweden
[3] Univ London Imperial Coll Sci Technol & Med, Sch Med, Dept Infect & Trop Med, Harrow HA1 3UK, Middx, England
[4] Univ Edinburgh, Ashworth Labs, ICAPB, Edinburgh EH9 3JT, Midlothian, Scotland