1. Department of Immunobiology, Guy's, King's and St Thomas' School of Medicine, Guy's Hospital, London SE1 9RT
2. Department of Parasitology, Biomedical Primate Research Centre, 2280 GH, Rijswijk, The Netherlands
3. Department of Anatomy, Cell and Human Biology, Guy's, King's and St. Thomas' School of Biomedical Science, Guy's Hospital, London SE1 1UL, United Kingdom