1. Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
2. Department of General, Visceral and Transplant Surgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
3. Institute for Medical Informatics, Biometry and Epidemiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
4. Twincore Center for Experimental and Clinical Infection Research, Department of Experimental Virology, Hannover, Germany