1. Department of Infectious Diseases, Medical Microbiology and Hygiene, Heidelberg University Hospital, Heidelberg, Germany
2. Institute for Infection Prevention and Hospital Epidemiology, Medical Center, University of Freiburg, Freiburg im Breisgau, Germany
3. Institute for Hygiene and Public Health, Bonn University Hospital, Bonn, Germany
4. Department of Hospital Hygiene, University Medical Center Mannheim, Mannheim, Germany
5. Department of Hematology, Oncology, and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany