1. Centre for Geographic Medicine Research, Kenya Medical Research Institute–Wellcome Trust Research Programme, PO Box 230, 80108 Kilifi, Kenya.
2. Centre for Clinical Vaccinology and Tropical Medicine, Oxford OX3 7BN, UK.
3. The Jenner Institute, Oxford OX3 7BN, UK.
4. European Vaccine Initiative, 69120 Heidelberg, Germany.
5. ReiThera, Viale Città d’Europa 679, 00144 Rome, Italy.
6. CEINGE, Via Gaetano Salvatore 486, 80145 Naples, Italy.
7. Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy.
8. Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK.