Abstract
1 Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
2 The Swedish Institute for Infectious Disease Control, Stockholm, Sweden
3 Immunology Laboratory, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
4 TNO Biosciences, Leiden, The Netherlands
5 Crucell Holland, Leiden, The Netherlands
6 Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden