1. Department of Surgery, Poliambulanza Foundation Hospital, Brescia, Italy
2. Department of Surgery, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
3. Department of Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
4. Department of Surgery, Oncology and Gastroenterology, Hepatobiliary Surgery and Liver Transplantation Unit, Padova University Hospital, Padova, Italy
5. Department of General and Oncological Surgery, Umberto I Mauriziano Hospital, Turin, Italy
6. Hepatobiliary Surgery Division, IRCCS San Raffaele Hospital, Milan, Italy
7. Department of Hepato-Pancreato-Biliary Surgery and The Intervention Center, Oslo University Hospital, Oslo, Norway
8. Institute of Clinical Medicine, Medical Faculty, University of Oslo, Oslo, Norway
9. Department of Surgery N1, Yerevan State Medical University, Yerevan, Armenia
10. Department of Hepato-Pancreato-Biliary Surgery, Moscow Clinical Research Centre, Moscow, Russia
11. Department of Surgery, Virginia Mason Medical Center, Seattle, Washington
12. Department of Surgery, University of California, San Francisco
13. Hepatobiliary and Abdominal Transplantation Surgery, Department of Experimental and Clinical Medicine, Riuniti Hospital, Polytechnic University of Marche, Ancona, Italy
14. Chirurgia Epatobiliare, Università Cattolica del Sacro Cuore-IRCCS, Rome, Italy
15. Department of Surgery, University of Verona, Verona, Italy
16. Department of General and Digestive Surgery, Clinica Universidad de Navarra, Pamplona, Spain
17. Department of Digestive, Oncologic and Metabolic Surgery, Institut Mutualiste Montsouris, Université Paris Descartes, Paris, France
18. Department of Digestive and Hepatobiliary/Pancreatic Surgery, Groeninge Hospital, Kortrijk, Belgium