1. Department of Visceral; Transplant and Thoracic Surgery; Medical University Innsbruck; Innsbruck Austria
2. Department for General, Visceral and Transplantation Surgery, Campus Virchow-Klinikum; Charité Universitätsmedizin; Berlin Germany
3. Institute of Pathology; Medical University Innsbruck; Innsbruck Austria
4. Department of Surgery, Clinic Grosshadern; Ludwig-Maximilian-University Munich; Munich Germany