1. Department of General, Abdominal, and Vascular Surgery, University Hospital, Magdeburg, Germany,
2. Department of Biometry and Medical Informatics, Otto von Guericke University Magdeburg, Magdeburg, Germany.
3. Institute of Medical Microbiology, University Hospital, Magdeburg, Germany,
4. Department of Anaesthesiology and Intensive Care Medicine, Hospital Magdeburg, Magdeburg, Germany