1. Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon.
2. Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.
3. Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.
4. Department of Immunology and Infection, London School of Hygiene and Tropical Medicine, London, United Kingdom.
5. Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, The Netherlands.