Institution: | 1. Department of Molecular Biosciences, University of Oslo, Blindern, N‐0316 Oslo, Norway;2. Department of Biology, Norwegian University of Science and Technology, Realfagbygget, N‐7491 Trondheim, Norway;3. Present Address: Centre for Immune Regulation, Institute of Immunology, University of Oslo, Oslo, Norway;4. University of Sk?vde, SE‐541 28 Sk?vde, Sweden |