1. Department of Anaesthesiology and Intensive Care, Charité-Universitätsmedizin Berlin, Berlin, Germany
2. Institute for Microbiology and Hygiene, Charité-Universitätsmedizin Berlin, Berlin, Germany
3. Medical School Hannover, Institute for Medical Microbiology and Hospital Epidemiology, Hannover, Germany
4. Institute of Medical Biometrics and Clinical Epidemiology, Charité-Universitätsmedizin Berlin, and SOSTANA GmbH Berlin, Berlin, Germany
5. Helios Clinic Emil von Behring, Clinic for Respiratory Diseases Heckeshorn, Berlin, Germany