1. Institute for Medical Microbiology, Georg-August-University, Göttingen, Germany
2. Institute of Infection Control and Infectious Diseases, Georg-August-University Göttingen, Germany
3. Department of Thoracic and Cardiovascular Surgery, Georg-August-University, Göttingen, Germany
4. Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
5. Department of Cardiac Surgery, Ludwig-Maximilian-University of Munich, Munich, Germany