1. Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
2. Institute of Molecular Bacteriology, Twincore, Centre for Clinical and Experimental Infection Research, Hannover, Germany
3. Department of Molecular Bacteriology, Helmholtz Centre for Infection Research, Braunschweig, Germany
4. German Centre for Infection Research (DZIF), Braunschweig, Germany