1. Department of General, Visceral, and Transplantation Surgery; Charité - Universitaetsmedizin Berlin; Berlin; Germany
2. Division of Gastroenterology and Hepatology; Department of Medicine; Charité - Universitaetsmedizin Berlin; Berlin; Germany
3. Department of Anaesthesiology and Intensive Care Medicine; Charité - Universitaetsmedizin Berlin; Berlin; Germany
4. Department of Radiology; Charité - Universitaetsmedizin Berlin; Berlin; Germany