1. Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
2. National Institute of Malariology, Parasitology and Entomology, Hanoi, Vietnam
3. Centre for Disease Control and Prevention, Pleiku, Gia Lai, Vietnam
4. Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine, Fajara, The Gambia