1. Department of Surgery, Fondazione Poliambulanza Istituto Ospedaliero , Brescia , Italy
2. Department of Surgery, Koç University School of Medicine , Istanbul , Turkey
3. Department of Surgery, Amsterdam UMC, location University of Amsterdam , Amsterdam , The Netherlands
4. Cancer Center Amsterdam , Amsterdam , The Netherlands
5. Department of General and Oncological Surgery, Umberto I Mauriziano Hospital , Turin , Italy
6. Hepatobiliary Surgery Division, IRCCS San Raffaele Hospital , Milan , Italy
7. Servei de Cirurgia General i Digestiva, Hospital Universitari Doctor Josep Trueta de Girona , Girona , Spain
8. Department of Surgery, University Hospital Southampton NHS Foundation Trust , Southampton , UK
9. Department of Surgery, HPB and Liver Transplantation Unit, University Clinic, Universidad de Navarra, Institute of Health Research of Navarra (IdisNA) , Pamplona , Spain
10. Department of Surgical, Oncological and Gastroenterological Sciences, General Surgery 2, Hepato-pancreato-biliary Surgery and Liver Transplantation, Padua University Hospital , Padua , Italy
11. The Intervention Centre and Department of HPB Surgery, Oslo University Hospital and Institute of Medicine, University of Oslo , Oslo , Norway
12. Department of Digestive and Hepatobiliary/Pancreatic Surgery, Groeninge Hospital , Kortrijk , Belgium
13. Department of Digestive, Oncologic and Metabolic Surgery, Institut Mutualiste Montsouris, Université Paris Descartes , Paris , France
14. Hepatobiliary and Pancreatic Surgery Unit, Hospital del Mar, Hospital del Mar Medical Research Institute (IMIM), Universitat Pompeu Fabra , Barcelona , Spain
15. Department of Hepato-Pancreato-Biliary Surgery, Moscow Clinical Research Centre , Moscow , Russia
16. Liver Unit, Queen Elizabeth Hospital , Birmingham , UK