1. Institute of Medical Microbiology, RWTH Aachen University Hospital 1 , Aachen, Germany
2. Central Microscopy Unit, University of Kiel 2 Department of Biology, , Kiel, Germany
3. University of Oslo 3 Department of Biosciences, , Oslo, Norway
4. University of Osnabrück 4 Division of Microbiology, , Osnabrück, Germany
5. Institute of Molecular Infection Biology, University of Würzburg 5 , Würzburg, Germany
6. Helmholtz Institute for RNA-based Infection Research, Helmholtz Centre for Infection Research 6 , Würzburg, Germany
7. Biocentre, University of Würzburg 7 Department of Microbiology, , Würzburg, Germany