1. Department of Surgery, Clinic of General, Visceral, Vascular and Thoracic Surgery, University Medicine Greifswald, Greifswald, Germany.
2. Institute for Hygiene and Environmental Medicine, University Medicine Greifswald, Greifswald, Germany.
3. Friedrich Loeffler Institute of Medical Microbiology, University Medicine Greifswald, Greifswald, Germany.
4. Department for Infection Control and Hospital Epidemiology, Medical University of Vienna, Vienna, Austria.
5. Hospital Landesklinikum Neunkirchen, Neunkirchen, Austria.