1. Department of General, Visceral, and Transplantation Surgery, Campus Grosshadern, Ludwig Maximilians-University, Munich, Germany.
2. Department of Anesthesiology, University Hospital of Munich, Campus Grosshadern, Munich, Germany.
3. Max von Pettenkofer Institute for Hygiene and Medical Microbiology, University of Munich, Munich, Germany.
4. Research Unit for Biopsychosocial Health, Department of Medical Informatics, Biometry and Epidemiology–IBE, Ludwig Maximilians-University, Munich, Germany.