1. Department for General, Visceral and Transplantation Surgery; Charité Universitätsmedizin; Berlin Germany
2. Department of Visceral, Transplant and Thoracic Surgery; Innsbruck Medical University; Innsbruck Austria
3. Department of Radiology; Innsbruck Medical University; Innsbruck Austria
4. Department of Medical Statistics, Informatics and Health Economics; Innsbruck Medical University; Innsbruck Austria