1. Department of Health Technology, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark;
2. Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, CP 1650 San Martin, Buenos Aires, Argentina
3. Division of Vaccine Discovery, La Jolla Institute for Immunology, La Jolla, California 92037, USA
4. Department of Medicine, University of California, San Diego, La Jolla, California 92093, USA
5. Department of Immunology and Microbiology, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark