1. Department for Infectious Disease Immunology, Statens Serum Institut, Artillerivej 5, DK-2300 Copenhagen, Denmark
2. Department of Growth and Reproduction, Rigshospitalet, Juliane Maries Vej 6, DK-2100 Copenhagen, Denmark
3. Division of Bio-therapeutics, Leiden University, Einsteinweg 55, NL 2333 Leiden, Holland
4. Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3C, DK-2200 Copenhagen, Denmark