1. Department of General, Visceral, and Transplant Surgery, University of Heidelberg, Heidelberg, Germany
2. Department of Surgery, Kantonsspital St. Gallen, St. Gallen, Switzerland
3. Institute of Clinical Microbiology and Immunology, Kantonsspital St. Gallen, St. Gallen, Switzerland
4. Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
5. Infectious Disease Service, Kantonsspital Bruderholz, Bruderholz, Switzerland
6. Department of Surgery, Kantonsspital Bruderholz, Bruderholz, Switzerland