1. Department of Molecular Microbiology and Institute of Biomembranes, Utrecht University, Utrecht, The Netherlands
2. Unit of Microbiology and Immunology, Faculty of Veterinary, University of Zaragoza, Zaragoza, Spain
3. Research and Development Department, U-Protein Express BV, Utrecht, The Netherlands
4. Department of Clinical Chemistry and Haematology, University Medical Center Utrecht, Utrecht, The Netherlands
5. Department of Microbiology, University of Oslo, Oslo, Norway