1. Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Faculty of Medicine and University Hospital Cologne, Goldenfelsstraße 19-21, 50935 Cologne, Germany
2. German Centre for Infection Research, partner site Bonn-Cologne (DZIF), Cologne, Germany
3. Institute of Medical Microbiology, Immunology and Parasitology, Bonn University Hospital, Bonn, Sigmund-Freud-Str. 25, 53127 Bonn, Germany
4. Department I for Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Straße 62, 50937 Cologne, Germany
5. Department of Medicine I, Bonn University Hospital, Bonn, Sigmund-Freud-Straße 25, 53127 Bonn, Germany