1. Institute for Pharmaceutical Microbiology, University Hospital Bonn, University of Bonn, Meckenheimer Allee 168, 53115 Bonn, Germany.
2. Clausius Institute of Physical and Theoretical Chemistry, University of Bonn, Wegelerstr. 12, 53115 Bonn, Germany.
3. German Center for Infection Research (DZIF), Partner site Bonn-Cologne, 53115 Bonn, Germany.