1. Division of Biophysics, Cell Biology InstituteUniversity of Bonn Bonn Germany
2. Research Center Borstel Borstel Germany
3. Department of BiosciencesUniversity of Oslo Oslo Norway
4. Pharmaceutical InstituteUniversity of Bonn Bonn Germany
5. Institute for Medical Microbiology, Immunology and Hygiene, University Medical Center, and Center for Molecular Medicine Köln, and German Center for Infection Research (DCIF) Cologne Germany