1. Department of Immunology, Faculty of Medicine, Imperial College London, United Kingdom.
2. Cytheris S.A. Vanves, Paris, France.
3. Department of Virology , Biomedical Primate Research Centre, Rijswijk, The Netherlands.
4. Department of Parasitology, Biomedical Primate Research Centre, Rijswijk, The Netherlands.
5. Department of Veterinary Medicine, University of Cambridge, United Kingdom.