1. Department of Surgery, Maastricht University Medical Centre and NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands
2. Hepatopancreaticobiliary Surgery Unit, Department of Surgery, Hospital Universitario de la Princesa, Madrid, Spain
3. Department of Pathology, Seoul National University Bundang Hospital, Seoul National College of Medicine, Seongnam, Korea
4. Hepatopancreaticobiliary Service, Upper Gastrointestinal Surgery, The Alfred Hospital, and Division of Cancer Surgery, Peter MacCallum Cancer Centre, Department of Surgery, University of Melbourne, St Vincent's Hospital, Melbourne, Victoria, Australia
5. Digestive Surgery and Transplantation, Hôpital de Hautepierre, University Hospital of Strasbourg, Strasbourg, France
6. Department of Surgical Oncology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands
7. Department of Hepatobiliary Surgery and Liver Transplant, Beaujon Hospital, Assistance Publique – Hôpitaux de Paris, Université Denis Diderot, Paris, France
8. Department of Hepatopancreaticobiliary Surgery, Japanese Red Cross Medical Centre, Tokyo, Japan
9. Division of Hepatobiliary and General Surgery, Humanitas Clinical and Research Centre, Humanitas University, Rozzano, Italy
10. Department of Methodology and Statistics, Maastricht University Medical Centre, and CAPHRI School for Public Health and Primary Care, Maastricht, The Netherlands
11. GROW School for Oncology and Developmental Biology, Maastricht University, Maastricht, The Netherlands
12. Department of Hepatopancreaticobiliary Surgery and Liver Transplantation, Institute for Liver and Digestive Health, Royal Free Hospital, University College London, London, UK
13. Department of Surgery, Seoul National University Bundang Hospital, Seoul National College of Medicine, Seongnam, Korea
14. Division of Cancer Surgery, Peter MacCallum Cancer Centre, Department of Surgery, University of Melbourne, St Vincent's Hospital, Melbourne, Victoria, Australia
15. Digestive Surgery and Transplantation, Hôpital de Hautepierre, University Hospital of Strasbourg, University of Strasbourg, Strasbourg, France
16. Department of Pathology, Hôpital de Hautepierre, University hospital of Strasbourg, University of Strasbourg, Strasbourg, France
17. Digestive Tumours Unit, Institut Bergonié, Bordeaux, France
18. Department of Digestive and Hepatobiliary Surgery, La Pitié Hospital, Université Pierre et Maris Curie, Paris, France
19. Department of Pathology, Mauriziano Umberto I Hospital, Turin, Italy