1. Department of Surgery Medical University of ViennaGeneral Hospital Vienna Austria
2. Department of Surgery Division of Hepatobiliary and Pancreas Surgery Mayo Clinic Rochester MN
3. Institute of Bioinformatics BiocenterMedical University of Innsbruck Innsbruck Austria
4. Department of Visceral, Transplantation and Thoracic Surgery Medical University Innsbruck Innsbruck Austria
5. Robert D. and Patricia E. Kern Center for the Science of Health Care Deliver Mayo Clinic Rochester MN
6. Center of Physiology and Pharmacology Medical University of Vienna Vienna Austria
7. Department of General, Visceral and Vascular Surgery SKG Klinikum Vöcklabruck Austria
8. Department of Surgery HPB CenterViennese Health NetworkClinic Favoriten and Sigmund Freud Private University Vienna Austria