1. Department of Pharmaceutical Biosciences, Uppsala University, Uppsala 751 24, Sweden.
2. Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 104 00, Thailand.
3. Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7FZ, UK.
4. Shoklo Malaria Research Unit (SMRU), Mae Sod 631 10, Thailand.