1. Department of Immunology, Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
2. Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom
3. KEMRI-Wellcome Trust Collaborative Research Programme, Centre for Geographical Medicine, Kilifi, Kenya
4. Institute for Virology, University of Ulm, Ulm, Germany
5. Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
6. Department of Biochemistry G. Moruzzi, University of Bologna, Bologna, Italy
7. Department of Laboratory Medicine, Division of Clinical Microbiology, Karolinska University Hospital, Huddinge, Sweden
8. Department of Hematology and Clinical Oncology, L. and A. Seragnoli, University of Bologna, Bologna, Italy