1. Institute for Microbiology, University of Veterinary Medicine Hannover, Hannover, Germany
2. Department of Molecular Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany;
3. Institute for Experimental Infection Research, TWINCORE Centre for Experimental and Clinical Infection Research, a joint venture between the Helmholtz Centre for Infection Research and the Hannover Medical School, Hannover, Germany
4. Institute of Immunology, Hannover Medical School, Hannover, Germany