1. School of Pure and Applied Natural Sciences, University of Kalmar, SE-39182 Kalmar, Sweden
2. Discipline of Immunology and Microbiology, Faculty of Health, The University of Newcastle, David Maddison Clinical Sciences Building, Royal Newcastle Hospital, Newcastle, NSW 2300, Australia
3. Department of Pathology, University of Texas Medical Branch, Galveston, Texas, USA
4. Department of Cell and Molecular Biology (CMB), Karolinska Institutet, Stockholm, Sweden